Mathematics High School

Help me please, if you don’t know, don’t answer. Thank you <3

Answers

Answer 1

Answer:

Step-by-step explanation:

1). (B). Replace one equation with the sum/difference of both equation.

System B is

- 4x - 6y = 9 ........ (1B)

-4x + 3x = - x

- 6y + y = - 5y

9 - 4 = 5

- x - 5y = 5 ........ (2B)

2). Yes, both system are equivalent.

Related Questions

Will mark as brainliest ❤️

Answers

Answer:

is just a "place-holder" or "variable.

then (using a different variable)

(

)

using a constant

(

)

Since

for the given example

(

)

A baseball is hit from an initial height of 3 feet and reaches a maximum height of 403 feet. Which function could be used to model this situation, where h(t) is the height, in feet, after t seconds?

A. h(t) = -16(t - 403)^2 + 3
B. h(t) = -16(t - 5)^2 + 3
C. h(t) = -16(t - 3)^2 + 403
D. h(t) = -16(t - 5)^2 + 403

Answers

Answer:

I believe its A

Step-by-step explanation:

D. h(t) = -16(t - 5)² + 403 could be used to model this situation.

What are the given informations ?

A baseball is hit from an initial height of 3 feet.

The baseball reaches a maximum height of 403 feet.

Here, h(t) indicates the height in feet after t seconds.

Which function is correct ?

At the start, t = 0 & Initial height = 3 feet ,i.e. h(0) = 3

We have to verify options by putting t = 0

A. h(t) = -16(t - 403)² + 3

So, h(0) = -16(0-403)² + 3 = -16(-403)² +3 = -2598544+3 = -2598541

B. h(t) = -16(t - 5)² + 3

So, h(0) = -16(0-5)² + 3 = -16(-5)² + 3 = -400+3 = -397

C. h(t) = -16(t - 3)² + 403

So, h(0) = -16(0-3)² + 403 = -16(-3)² + 403 = -144 + 403 = -259

D. h(t) = -16(t - 5)² + 403

So, h(0) = -16(0-5)² + 403 = -16(-5)² + 403 = -400 + 403 = 3

Hence, in this function h(0) = 3 verified.

Therefore h(t) = -16(t - 5)² + 403 is the required function.

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What is 4 1/3 times 4 1/2

Answers

Answer:

19 1/2

Step-by-step explanation:

4 1/3 = 13/3

4 1/2 = 9/2

13/3 x 9/2

13/1 x 3/2 ( 3 goes into nine so i simplified)

13 x 3/1 x 2 = 39/2 = 19 1/2

this is for pre-calc can someone pls help

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Answer:

Question 18: 453,600

Step-by-step explanation:

The length of the hypotenuse, line segment AC, in right
triangle ABC is 25 cm. The length of line segment BC is
15 cm.

Answers

What is the question? The Hypotenuse? If so there is still not enough evidence.

if the question is asking for the length of AB :
since the triangle is a right angled one, we can apply the Pythagoras’ Theorem.

AC^2 = BC^2 + AB^2
25^2 = 15^2 + AB^2
625 = 225 + AB^2
AB^2 = 400
AB = 20cm

The length of line AB is 20cm.

Distance = 30 m, Time = 6 minutes, Speed = ?

Helpppp

Answers

Answer:

its 5 m/minute

Step-by-step explanation:

you have to use the units that are given in the equation

pls mark brainliest if you geel like it...

Answer:

5 minutes

Step-by-step explanation:

6 min x 5 min = 30

i just multiply

1) f(x) = 5x^4+ 49x^2+ 36

Answers

Answer:

That's the simplest I could do, sorry

Jackie has a maximum of $450 to spend on shirts and jeans. The shirts she wants to buy are $12 each, including tax. The jeans she wants to buy are $27 each, including tax. What is an inequality that represents all possible combinations of s, the number of shirts, and j, pairs of jeans, Jackie can buy

Answers

Answer: 12s+27j≤450

Step-by-step explanation:

From the question, we are informed that Jackie has a maximum of $450 to spend on shirts and jeans and that the shirts she wants to buy are $12 each, including tax while the jeans she wants to buy are $27 each, including tax.

The inequality that represents all possible combinations of s, the number of shirts, and j, pairs of jeans, Jackie can buy will be:

= 12s+27j≤450

What is the coefficient in the expression 5+ 9y5+9y5, plus, 9, y?

Answers

Answer:

Step-by-step explanation:

The coefficient is the number part.

Answer:

Step-by-step explanation:

Correct me if i'm wrong

evaluate the expression 2b3 + 5 when b = 3.

Answers

Answer:

Its 3

Step-by-step explanation:

Its Really easy ngl. if b = 3 and there is a 2 and u are supposed to replace the b its 3

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The value of 2b³ + 5 at b = 3 is 59.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

2b³ + 5 _____(1)

We will find the value of the expression 2b³ + 5 at b = 3.

Substitute b =3 in (1).

= 2b³ + 5

= 2 x 3³ + 5

= 2 x 3 x 3 x 3 + 5

= 2 x 27 + 5

= 54 + 5

= 59

Thus,

The value of 2b³ + 5 at b = 3 is 59.

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Evaluate: 2x + 5x - 11 = -46

Answers

Answer:

x=-5

Step-by-step explanation:

Combine like terms: 7x-11=-46

Add 11 to -46: -35

Divide: 7x/-35

ANSWER: x=-5

9 ft=_____ in Do y'all know the answer to this plz help me out plz and thanks

Answers

Answer:

108

Step-by-step explanation:

As 1 foot = 12 inches, 9 foot = 12*9 = 108.

Hope this helps! :)

Answer:

The answer is 108. 1 foot equals 12 inches. So, you just need to multiply 9 by 12. 9 x 12 = 108.

[tex]\frac{6\sqrt{3} }{7\sqrt{8} }[/tex]

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4.1991 I just put it in a calculator

Please help me out!

Answers

Answer:

Step-by-step explanation:

0.2 is the correct answer

4 A bricklayer lays 1500 bricks in an 8-hour day. Assuming he continues to
work at the same rate, calculate:
a how many bricks he would expect to lay in a five-day week
b how long to the nearest hour it would take him to lay 10000 bricks.

Answers

Answer:

answer of a is 7500and the answer of b is53 hours

A -7500 B-53hours
Explanation:

Jim earns 3% commission every month on his total sales. This month, his total sales were $620,000. How much commission did Jim earn?
Group of answer choices

A-$18,600

B-$20,600

C-$206,000

D-$186,000

Answers

answer is A. $18,600 because $620,000 × 3% = $18,600

pretty sure its A.

Brainliest?... thx

Help? How do I do this.

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z:60 y:36 x:48. I just look at the lengths and assign the values to the logical placement due to size.

7. The graph of the linear function is shown on the coordinate grid below.

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Answer: C . The slope is -4/3 and the y-intercept is 4.

Step-by-step explanation:

Using the two given points, we will use them to evaluate the slope and the y intercept.

(-1.5,6)

( 4.5,-2)

To find the slope we will find the difference in the y coordinates of the points and divide it by the difference in the x coordinates of the point.

6-(-2) = 8

-1.5 - 4.5 = -6

Slope : 8/-6= -4/3.

Since the slope is -4/3, we will use the formula y= mx + b to find the y intercept. In the formula y= mx + b, the slope is m and b is the y intercept.

Use one of the given points, and input its x and y values into the formula including the slope to solve for b(the y-intercept).

We will use the point, ( -1.5,6)

6 = -4/3(-1.5) + b

6 = 2 + b

-2 -2

b = 4.

b is indeed equal to 4 because it even indicates on the graph that the y intercept is 4 which is where x is equal to 0.

A shadow 16 meters long is cast by a utility pole that is 12 meters tall. What is the length of
the shadow cast by a nearby apple tree that that is 6 meters tall?
Write your answer as a whole number or a decimal. Do not round.

Answers

Answer:

Step-by-step explanation:

A holiday costs £1900. Work out the
price after a 9% discount.

Answers

Answer:

$1729

Step-by-step explanation:

[tex]\frac{100-9}{100} * 1900[/tex]

Answer:

1729

Step-by-step explanation:

1900 divided by 100 is 19

1% equals 19

1 times 9 equals 9

19 times 9 equals 171

171 = 9%

171 - 1900 = 1729

price after a 9% discount is 1729

Which values from the given replacement set make up the solution set of the inequality? 2b≥6;

A) { 3, 4}

B) {2, 3, 4}

C) {1, 2, }

D) {1, 2, 3}

Answers

The answer is A because the variable can’t be no lower than 3 and every other answer has 2 in it. 2•(3) is equal to 6 and 2•(4) is greater than 6 which correlates with the sign (greater than or equal to).

Solve for X and Y using substitution.
1)
12x +y = 36
x+4y=24

Answers

{x,y}={24,12} I think that is the answer to this question....

How many hours are in 40% of a week?

Answers

Answer:

67.2 hours

Step-by-step explanation:

Answer:

Step-by-step explanation:

67.2 hours are in 40% of a week.

the length of a rectangle is 5 more than twice the width. if the perimeter of the rectangle is 76 meters, find the dimensions of the rectangle and choose the equation that represents the perimeter:

1. 76=2w+5
2. 76=2w+2(2w+5)
3. 76=w+2w+5
4. 76=2w+(2w+5)

Answers

Answer:

Dimensions: 11 meters by 27 meters

2. [tex]76=2w+2(2w+5)[/tex]

Step-by-step explanation:

Finding Dimensions:

The perimeter of a rectangle can be written as [tex]2l+2w[/tex] where [tex]l[/tex] is the length and [tex]w[/tex] is the width. It is given that the length is 5 more than twice the length of width and the perimeter of the rectangle is 76 meters.

With this information we can write:

Length = [tex]2w+5[/tex]

[tex]2(2w+5)+2w = 76[/tex] (perimeter of the rectangle)

[tex]4w+10+2w=76[/tex]

[tex]6w=66[/tex]

[tex]w=11[/tex]

Length = [tex]2(11)+5[/tex]

Length = [tex]27[/tex]

∴ The dimensions of the rectangle is 11 meters by 27 meters.

Perimeter

Since the length can be written as [tex]2w+5[/tex], the equation that represents the perimeter of the rectangle is [tex]76=2w+2(2w+5)[/tex]

Determine if this quadrilateral is a parallelogram. Justify your answer.

Answers

Answer:no

Step-by-step explanation:

the properties for a parallelograms are

opposite angles are equalopposite sides are equaldiagonals bisect each othersum of any two adjacent angles is 180

we can conclude that the quadrilateral is not a parallelogram because it only has one pair of opposite sides that are equal. (the dashes through the sides show they are congruent to each other)

I NEED HELP ASAP THANKSSS

factor x^2 +9x+20

Answers

Answer:

(x + 5)(x + 4)

Step-by-step explanation:

[tex]x^{2} +9x+20=(x+5)(x+4)[/tex]

Answer:

Step-by-step explanation:

x^2+9x+20

(x+4)(x+5)

Then choose whether you would find the percent increase or percent decrease: A town’s population was 36,067 in 2005. Ten years later, the population is 37,902.

Answers

Answer:

Increase

Step-by-step explanation:

1,835 more people came

The table below represents an exponential function. By what factor does each term grow by?

x y
1 2
2 8
3 32

A.6
B.8
C.4
D.2

Answers

C.4 is the answer to the question

A contractor hires 4 workers for a construction project. Each worker is paid $12 per hour. The contractor also buys 20 cubic yards of concrete for the project, at a price of $160 per cubic yard. Which equation best describes the contractor’s total cost, C, if the project takes h hours to complete?

C = (4 x 12)h + (20 x 160)

C = 4(12 + 160)h + 20

C = (20 x 160)h + (4 x 12)

C = 12h + (20 x 160)

Answers

Answer:

The answer is C.

Step-by-step explanation:

4 x 12 is how much money per worker per hour. 20 x 160 is how much the cost for the concrete. Adding them gets you the total cost.

Hope this helped!

The equation that can be used to describe the contractor’s total cost, C, if the project takes h hours to complete is C = (4 × 12)h + (20 + 160)

Given:

Number of workers = 4

Earnings of each work = $12

Yards of concrete = 20 cubic yards

Cost per cubic yards = $160

let

C = total cost

h = number of hours needed to complete the project

C = (Number of workers + Earnings of each work)number of hours + (Yards of concrete + Cost per cubic yards)

C = (4 × 12)h + (20 + 160)

Therefore, the equation that can be used to describe the contractor’s total cost, C, if the project takes h hours to complete is C = (4 × 12)h + (20 + 160)

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Graph h(x)=8 I x+1 I -1.

Answers

Answer:

search it up its there

Step-by-step explanation:

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