You earned a 72% on a science test. You answered 18 questions correctly. How many questions were on the test? PLS put a step by step explanation cus I am doing a quiz and no work =no points. PLS put a explanation.

Answers

Answer 1

Answer:

4

Step-by-step explanation:

72/18=4

Answer 2

Answer:

25

Step-by-step explanation:

y = 18 ÷ [tex]\frac{72}{100}[/tex]

y = 18 ÷ 0.72

y = 25


Related Questions

Jasmine bought a ticket to the Jets game. She got a 25 % 25% discount on her ticket but then had to pay a 10 % 10% service fee on the discounted price. Jasmine’s final ticket price was what percent of the original ticket price?

Answers

Answer:

15%

Step-by-step explanation:


The values of several terms in a sequence are shown in the table.

Second=5
Fourth=12
Seventh=22.5
Find the first term, f (1).

Answers

Answer:

1.5

Step-by-step explanation:

You divide and stuff. Then you subtract 3.5 from 5 to get 1.5 and bam answer.

Brianna wants to know how many internet-compatible devices are owned, on
average, by people in her town. Can she use her sample data to form a valid inference
about the town? Explain.

Answers

Answer:Who is BRIANNA

Step-by-step explanation:

Jeanie bought 5 pounds of apples for $5.50. How much do the apples cost per pound?

$0.55
$1.10
$1.05
$1.00

Answers

Answer:$1.10

Step-by-step explanation:n/A

Answer: $1.10

Step-by-step explanation:

took the test

Below is the graph of the equation y=|x+2|-1. Use this graph to find all values of x such that
y>0
y<0
y=0
Please Help I will award the brainiest

Answers

Answer:

y>0,        -3>x> -1

y<0,        -3<x<-1

y = 0,       x = -3 and x = -1

Step-by-step explanation:

Answer:

Agree with the other answer but for RSM users, if y>0, type in: x>-1, x<-3 or the server won’t accept your answer.

Have a good day!

In the phrase "rise over the run", what does rise indicate?

Group of answer choices

The difference in y coordinates between two points on a line.


The difference x coordinates between two points on a line.


The difference between the x intercept of a line and the y intercept of a line.


The difference between a line's slope and its length

Answers

The difference between the x intercept and the y intercept

Which expression is equivalent to 36a-12b?

3(6a-2b). 6(6a-2b). 3(6a+2b). 6(6a+2b)

Answers

Answer:

6(6a-2b)

Step-by-step explanation:

Answer:

6(6a-2b)

Step-by-step explanation:

if you multiply the 6 by what's in parenthesis you get 36a-12b

HeLp! the question is on the picture.

Answers

Answer:

sin ∅ = 24/25

Step-by-step explanation:

These are the trigonometric ratios

Remember SOHCAHTOA

Sine = Opposite over Hypotenuse (SOH)

Cosine = Adjacent over Hypotenuse (CAH)

Tangent = Opposite over Adjacent (TOA)

We are asked to find sin ∅

The trig function sin = opposite over hypotenuse

so we need to find the opposite side length of the indicated angle (∅)

The opposite side length is equal to 24

Then we find the hypotenuse ( the longest side length ) which would be 25

so sin ∅ = 24/25

Samantha knows that she needs $22,000 for a 10% down payment on a house she can afford. She found an investment that earns 2.75% interest compounding monthly. How much should she put in the account now, rounded to the nearest dollar, to ensure she has the down payment amount in 5 years?

$4,320

$19,177

$13,371

$5,649

Answers

Answer:

19,177

Step-by-step explanation:

I took the test

A parabola has its minimum point at (3,-5) and the y coordinate of the y-intercept is -2.
What is the equation of the parabola?

Answers

Answer:

y = [tex]\frac{1}{3}[/tex] x² - 2x - 2

Step-by-step explanation:

x-coordinate of the vertex of a parabola is ( [tex]- \frac{b}{2a}[/tex] )

y = f(x) = ax² + bx + c

(x, y) ∈ f(x)

~~~~~~~~~

{ (0, - 2), (3, - 5) } ⊂ { (x, y): y = ax² + bx + c }

a(0)² + b(0) + c = - 2 ⇒ c = - 2

a(3)² + b(3) + ( - 2) = - 5  

9a + 3b - 2 = - 5 ⇒ 3a + b = - 1

[tex]- \frac{b}{2a}[/tex] = 3 ⇒ b = - 6a

[tex]\left \{ {{3a+b=-1} \atop {b=-6a}} \right.[/tex]

3a + ( - 6a) = - 1

a = [tex]\frac{1}{3}[/tex]

b = - 2

y = [tex]\frac{1}{3}[/tex] x² - 2x - 2

The equation of the parabola for the given values is y = x²/3 - 2x - 2.

What is a parabola?

A parabola is the part of the conic section of which the points are equidistant from a fixed line called as directrix and a fixed point known as focus.

The general equation for the parabola is given as,

y = ax² + bx + c

Where c is the y-intercept.

Substitute c = -2 as per the question to obtain,

y = ax² + bx - 2

At (3,-5) the parabola has minimum value which implies y' = 0 as below,

y' = 2ax + b = 0

Substitute x = 3 to obtain,

2a × 3 + b = 0

=> -6a = b

And, y = -5 at x = 3 which gives,

-5 = 3²a + 3b - 2

=> 9a + 3b = -3

Substitute b = -6a to get,

9a - 18a = -3

=> a = 1/3

Which implies b = -6 × 1/3 = -2

Now, the equation for the parabola becomes as below,

y = x²/3 - 2x - 2

Hence, the required equation of the parabola is obtained as y = x²/3 - 2x - 2.

To know about parabola click on,

https://brainly.com/question/4074088

#SPJ2

Which of the following does a rigid motion preserve?

A. Side lengths only

B. Angle measures only

C. Side lengths and angle measure

D. Neither side lengths nor angle measures

Answers

Answer:

c

Step-by-step explanation:

The answer is C because it moved figures to a new location without changing its size and shape. Hope this helps.

Tommy's salary increases by 4% each year. This year, Tommy's salaray was $42,250. How much will her salary be in 7 years?

**Simplify ALL of the way and round to the NEAREST whole number**

Answers

Answer:

$295,750

Step-by-step explanation:

Given

Tommy's salary increases by 4% each year.

Increase to 4%

1 year = $42,250

7 years = $?

To find

So if 1 year is $42,250, then to find 7 years, you multiply the given by what you are trying to find.

Set up.

1/42250 x 7/x =

295,750

Therefore, Tommy's salary be in $295,750 7 years.

Julie's gross pay is $1,008.71. Her deductions total of $386.00 what is her net pay?

Answers

Answer:

i believe it is 622.71 im not sure tho

Step-by-step explanation:

Answer:

$622.71

Step-by-step explanation:

Net Pay = Gross Pay - Deductions

Net Pay = $1,008.71 - $386.00

Net Pay = $622.71

Leave a like if this helped

Write a congruence statement for the angles and/or sides that are given. State what additional information is required in order to know what the triangle are congruent for the given reason. WILL MARK BRIANLIEST !!!!!!!!! HELPP !!!

Answers

Step-by-step explanation:

Required information to prove the triangles are congruent:

AB=FE

Then you can say they are congruent by SAS

B
✓97
B
4

A
9
С
Select all true statements:
A) sin (©) = Vo
| B) tan (8) = 3
| C) tan (8) =
D) cos(B) = to
E) 42 +92 = 97

Answers

the answer is in the picture I’ll send u a link here phs.dcsdk12.org the answer is in there good luck!

Answer:

I need help with the answer as well

Step-by-step explanation:

En una muestra de 50 restaurantes de comida rápida, la venta media fue de $3.000, y la desviación estándar, $200. El intervalo de confianza del 95% es

Answers

Respuesta:

(2945.411; 3054.589)

Explicación paso a paso:

Dado ;

Tamaño de la muestra, n = 50

Media, xbar = 3000

Desviación estándar, s = 200

Nivel de confianza, Zcrítico al 95% = 1,96

El intervalo de confianza se define como:

Xbar ± margen de error

Margen de error = Zcrítico * s / sqrt (n)

Margen de error = 1,96 * 200 / sqrt (50)

Margen de error = 54.589

Límite inferior = (3000 - 54.589) = 2945.411

Límite superior = (3000 + 54.589) = 3054.589

(2945.411; 3054.589)

the local market is selling a pound of bananas for $0.55. if you bought 8 bananas for $1.44, what is the unit rate?

Answers

Answer:

$0.18

Step-by-step explanation:

Given that :

Number of bananas purchased = 8

Cost at which the 8 bananas were purchased = $1.44

The unit price of bananas can be obtained using the relation :

Total Cost of bananas / number of bananas

Unit price = $1.44 / 8

Unit price = $0.18

Price per unit of banana = $0.18

Simplify the ratio 154:132 in its simplest form

Answers

Answer:

The simplified ratio is 7:6

Step-by-step explanation:

First we have to find the GCF of both 154 and 132.  Since the GCF is 22, we will divide 154 by 22 and we get 7.  Now divide 132 by 22 and we get 6.  Therefore, the simplest form or the ratio 154:132 is 7:6.

simplify 4^3 x 4^5 a. 16x15 b. 16^8 c. 4^15 d. 4^8

Answers

Answer:

4^8

Step-by-step explanation:

4^3 x 4^5 = 4^3+5 = 4^8 = 65536

Ariana just started a running plan where she runs 7 miles the first week and then increases the number of miles she runs by 10% each week. If she keeps up this plan for 12 weeks, how many total miles would Ariana have run, to the nearest whole number?​

Answers

Answer: sarah ran 150 miles in 12 weeks

Step-by-step explanation:

Can someone help me find an equation for both of these ❤️

Answers

Answer and Step-by-step explanation:

First equation:

y = -4x + 9

This equation has a negative slope (a slope that does downwards) and has a positive y-intercept (at (0, 9)).

Second Equation:

y = -4x - 4

This equation is parallel to the first line because it has the same slope. It also has a negative y-intercept (at (0, -4)).

#teamtrees #PAW (Plant And Water)

Which equation would demonstrate the identity property? A. (3 • 4) + (3 • 5) = 3(4 + 5) B. 3 • 5 = 5 • 3 C. 3 • 4 • 5 = (3• 4) • 5 D. 4 • 1 = 4

Answers

Answer:

D. 4 • 1 = 4

Step-by-step explanation:

In Mathematics, we have two kinds of Identity property

a) Identity property of Addition

This means that when you add a number to zero, it gives you that same number

Example: 6 + 0 = 6

b) Identity property of Multiplication,

This means that, when a number is multiplied by 1, it gives that same number.

Example: 8 × 1 = 8

Therefore, from the above question, the equation that demonstrates identity property is 4 • 1 = 4

Option D is the correct answe

(b) 3, 3, 5 and
HOMEWORK: Complete the activity in your classwork e
the questions before you consult the memorandum att
ACTIVITY 1:
x
.) Find all the prime factors of each of the following
a) 825
(b) 999
-) 538
(d) 113​

Answers

Answer:

a 3,5,5,11

b 3,3,37,3

- 2,269

d 113, as it is a prime factor

6. CHALLENGE How many sides does a
regular polygon have if the measure of
an interior angle is 171°?

Answers

Answer:

40

Step-by-step explanation:

It is given that the measure of interior angle of a polygon is 171∘ . So, the correct answer is “ 40 ”.

Please help, I'm having a hard time with this ;-;

Answers

Answer:

A

Step-by-step explanation:

3 times steep means slope is 3 times

slope=4

new slope =3×4=12

translated 7 down means y intercept-7=1-7=-6

so new eq. is y=12x-6

Answer:

A

Step-by-step explanation:

So we know that the slope is 4, and we want to make it 3 times as steep, so that would be 12. The y-intercept is one and we want to move it down 7 units, 6-7= -1. So our final answer would be y= 12x-6!

Solve the system using elimination show all work for full credit.
X + 3y = -14
4x - 3y = 2
Help me

Answers

is it two separate problems or just you simplify both of the equations together

x = −12/5 and y = −58/15

Step-by-step explanation:

x+3y=−14

4x−3y=2

Add these equations to eliminate y:

5x = −12

Then solve 5x = −12 for x:

5x = −12

5x/5 = −12/5 (Divide both sides by 5)

x = −12/5

Now that we've found x let's plug it back in to solve for y.

Write down an original equation:

x + 3y = −14

Substitute −12/5 for x in x + 3y = −14:

−12/5 + 3y = −14

3y + −12/5 = −14

(Simplify both sides of the equation)

3y + −12/5 + 12/5 = −14 + 12/5

(Add 12/5 to both sides)

3y = −58/5

3y/3 = −58/5/3

(Divide both sides by 3)

y = −58/15

identify the arc length of TV◠ in terms of π.

Answers

Answer:

3.67

Step-by-step explanation:

If a and B are angles which tan a= 3/4 and cos B= 8/17. Determine the exact value of cos(a-B)

Answers

Answer:Life table of males at age 30. Probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001399

non Hispanic white population

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001116

non Hispanic white males

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001503

Jacob, non Hispanic white male. 30 years old.

Probability that Jacob lives to be 30 years old.  

Since the given probabilities are probabilities of dying, I think we simply subtract it from 1 to get the probability of living. We will use the probability of non Hispanic white male.

                                   

                                         Probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497

Step-by-step explanation:

Life table of males at age 30. Probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001399

non Hispanic white population

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001116

non Hispanic white males

29–30 . . . . . . . . . . . . . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . . . . . . . . . . . . . 0.001503

Jacob, non Hispanic white male. 30 years old.

Probability that Jacob lives to be 30 years old.  

Since the given probabilities are probabilities of dying, I think we simply subtract it from 1 to get the probability of living. We will use the probability of non Hispanic white male.

                                   

                                         Probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497

i want derivative for (x+1)^2×e^x
please help​

Answers

Answer:

(x + 1)(x + 3)eˣ

Step-by-step explanation:

Since f(x) = (x + 1)²eˣ

df(x)/dx = d[(x + 1)²eˣ]/dx

By the product rule, duv/dx = udv/dx + vdu/dx

where  u =  (x + 1)² and v = eˣ

So,  df(x)/dx = d[(x + 1)²eˣ]/dx

= (x + 1)²deˣ/dx + eˣd(x + 1)²/dx

= (x + 1)²eˣ + eˣd(x + 1)²/d(x + 1) × d(x + 1)/dx  (by the chain-rule dy/dx = dy/du × du/dx)

= (x + 1)²eˣ + eˣ[2(x + 1) × 1]

= (x + 1)²eˣ + 2eˣ(x + 1)

= (x + 1)eˣ(x + 1 + 2)

= (x + 1)eˣ(x + 3)

= (x + 1)(x + 3)eˣ

Philip use 40% off coupon on a single item in the craft store which saved him $16.42 what would the item have cost if he had not use the coupons?

Answers

Answer:

$41.05

Step-by-step explanation:

[tex]\frac{40}{100} =\frac{16.42}{x}[/tex]

[tex]40x=1642[/tex]

[tex]x=41.05[/tex]

So, the original price is $41.05.

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