Answer:
45%
Step-by-step explanation:
$78 is 65% of $120, therefore, the price was decreased by 45%. To prove 78 is 65% of 120, multiply 120x0.65 and you'll get 78. The reason you use 0.65 is because 65% is 0.65 in it's decimal form.
Write 7^5 in expanded form
Please I need an answer ASAP
Answer:
7 *7*7*7*7*7
* means times
Step-by-step explanation: Anything with a power is the base or big number times itself times the amount of the exponent little number
example 5^2
5*5
ABCD is a quadrilateral work out angle x
Answer:
Step-by-step explanation:
BD = 10CM
sin(b) = (sin(29)/10) x 13
X = 39.06cm
Check all of the functions that are odd.
f(x)=x3-x2
f(x)=x5-3x3+2x
f(x) = 4x + 9
f (x) = StartFraction 1 Over x EndFraction
Answer:
second and fourth
Step-by-step explanation:
answered the question
Reuben made $247 for 13 ours of work.
At the same rate, how many hours would he have to work to make $171 ?
pls help!!!
Answer:
9 hours
Step-by-step explanation:
We can use a ratio to solve
247 dollars 171 dollars
---------------- = -------------
13 hours x hours
Using cross products
247* x = 13*171
247x =2223
Divide each side by 247
247x/247 =2223/247
x=9
Find the value of cos 0 , If sec 0 = 3/2 0 < 90
Answer:
Step-by-step explanation:
cos theta is 2/3 because cos means reciprocal of sec
Answer:
option C
Step-by-step explanation:
[tex]sec\theta = \frac{1}{cos\theta}\\\\\frac{3}{2}= \frac{1}{cos\theta}\\\\cos\theta = \frac{1}{\frac{3}{2}} = \frac{2}{3}[/tex]
Find the value of x.
Answer:
x = 19 cm
Step-by-step explanation:
3+3+2+5+6 = 19
determine the constant in each algebraic expression
Solve for x.
1/3 (3/2x-3)=-5/6x
Answer: Hello
Step-by-step explanation: The answer is
1/3 (3/2 x -3) = -5/6x
Answer: x=3/4
Hope This Helps!
Answer:
x=3/4
Step-by-step explanation:
1/3 times 3/2 x is 1/2x
1/3 times -3 is -1
1/2x-1=-5/6x
1/2 is equal to 3/6
-1=-5/6x-3/6x
-1=-8/6x
x=6/8
x=3/4
A major car manufacturer wants to test a new engine to determine if it meets new air pollution standards. The mean emission, μ, of all engines of this type must be approximately 20 parts per million of carbon. If it is higher than that, they will have to redesign parts of the engine. Ten engines are manufactured for testing purposes and the emission level of each is determined. Based on data collected over the years from a variety of engines, it seems reasonable to assume that emission levels are roughly Normally distributed with σ = 3 parts per million of carbon. What are the appropriate null and alternative hypotheses?
Answer:
Step-by-step explanation:
the appropriate null and alternative hypotheses's are something
If the measurement of angle 3 is 120 degrees, what is the measurement of angle 5?
help me asap please!!!!!
Answer:
It's C.
Step-by-step explanation:
The area of a triangle is base times height times 1/2. The base times the height of that triangle is 66. 66 times 1/2 is 33. So, the correct answer is C.
Answer:
66 cm
Step-by-step explanation
11cm x 6 cm= 66cm
need this asapppp pleaseeeeeeeeeeeeeee
Answer:
D
Step-by-step explanation:
They both share a line/arm, and have the same vertex meaning they are exactly side by side like very close.
I'LL GIVE BRAINLIEST
If $3500 is invested at an interest rate of 2.9%, compounded quarterly, how much will the investment be worth after 8 years?
(equation to use in picture)
Answer:
$4,410
Step-by-step explanation:
What is the x-coordinate of the point that divides the directed line segment from J to K into a ratio of 2:5? 3 2- 1- X = { m m + n ] (x2 – xa) + x3 3 6 7 8 9 10 11 x -9-8-7-6-5-4-3-2-11- -2 J (6-2) -4 -2 2 -6 -7 -8 K(8-9) 29 -10 -11 -12 -13
Answer:
Step-by-step explanation:
The x-coordinate of the point that divides the line segment will be -2. Then the correct option is B.
What is the section of the line?Let A (x₁, y₁) and B (x₂, y₂) be a line segment. Then the point P (x, y) divides the line segment in the ratio of m:n. Then we have
x = (mx₂ + nx₁) / (m + n)
y = (my₂ + ny₁) / (m + n)
The two endpoints are (-6, -2) and (8, -9). And m: n = 2: 5. Then the value of the x-coordinate is calculated as,
x = (2 · 8 + 5 · -6) / (2 + 5)
x = (16 - 30) / (7)
x = - 14 / 7
x = - 2
The x-coordinate of the point that divides the line segment will be -2. Then the correct option is B.
More about the section of the line link is given below.
https://brainly.com/question/6582647
#SPJ7
Simplify the expression below. (2y+1)^2-4y^2+2
A. 4y+3
B. 2y+3
D. -1
Answer:
4 y + 3
Step-by-step explanation:
y = -3/4
d/dy((2 y + 1)^2 - 4 y^2 + 2) = 4
Indefinite integral:
integral(2 - 4 y^2 + (1 + 2 y)^2) dy = 2 y^2 + 3 y + constant
How many solutions does this system have?
y=3/4x-5
-3x+4y=-20
O one
O two
an infinite number
O no solution
Answer:
Infinite number
Step-by-step explanation:
Write in scientific notation:673,000
Answer:
6.73 x 10 ot the power of 5
Step-by-step explanation:
Y/4 =3 how do I answer pls
Answer:
y = 12
Step-by-step explanation:
2x-y=4
X and y intercept?
Answer:
x=2 y=-4
Step-by-step explanation:
2x-y=4 solve for x
2x-0=4
2x=4+0
2x=4 . divide both sides by 2
x=2
2x-y=4 . solve for y
0-y=4
-y=4 . divide both sides by -1
y=-4
Evaluate the expression (1/3)^2
Answer:
1/9 :)
Step-by-step explanation:
use the power rule, square both numerator and denominator, 1^2 = 1 3^2 = 9
hope this helps!!!!
The heights of some students are given. What is the range 152cm, 173cm, 148cm,163,cm, 166cm,158cm
Answer:
The range is 25
Step-by-step explanation:
Answer:
25 is the range
Step-by-step explanation:
173-148 is 25
Can someone explain this to me plz Unhelpful answers will be reported
Answer:
axb/2
Step-by-step explanation:
When theres a triangle with a right angle you need to make in a rectangle and divide it by 2
Answer:
In order to find the area of a triangle, you need to use the formula [tex]\frac{1}{2} bh[/tex]. Substitute the known values into the formula and solve the equation.
Step-by-step explanation:
The formula to calculate the area of a triangle is [tex]\frac{1}{2} bh[/tex], where [tex]b[/tex] represents the length of the triangle's base, and [tex]h[/tex] represents the length of the triangle's height. Since [tex]b[/tex] and [tex]h[/tex] are variables that have different values in regards to different triangles, that means you should substitute the known/given values of each variable into the formula and solve the equation.
Is it possible for the line segments of a triangle to be 6 cm, 7 cm, and 12 cm in length?
Yes or No? And why?
Answer:
Yes because sum of 2 line segment is greater than the third side
Step-by-step explanation:
John’s Rectangle is _____ units long.
John’s Rectangle is _____ units wide.
The area of John’s rectangle is ____ units^2.
Answer:
John's rectangle is 4 units long
John's rectangle is [tex]3\frac{1}{2}[/tex] units long
The area of John's rectangle is 14 units^2
Step-by-step explanation:
A rectangle has four sides that comprise of two pairs of equal length sides
The side which is the longest side of a rectangle is known as the length, L, of the rectangle
The side which is the shortest side of a rectangle is known as the width, W of the rectangle
Based on the given measurement, the length of the given rectangle which is the length of longest side of the rectangle, which is the 4 units length side
Therefore;
∴ John's Rectangle is L = 4 units long
the width of the given rectangle which is the length of shortest side of the rectangle, which is the side with lengths 3 units and 1/2 units length side
∴ The length of the shortest side of the rectangle, W = 3 units + 1/2 units = 3 1/2 units
∴ John's rectangle is W = [tex]3\frac{1}{2}[/tex] units wide
The area of John's rectangle, A = L × W
∴ The area of John's rectangle, A = 4 units × [tex]3\frac{1}{2}[/tex] units = 14 units².
5. Twenty volunteers with high cholesterol were selected for a trial to determine
whether a new diet reduces cholesterol. The volunteers were given a low-carb,
low-calorie diet. After 8 weeks of the diet, the average cholesterol of the
volunteers dropped a significant amount. This study is an example of
(A) A controlled experiment.
(B) An uncontrolled experiment.
(C) A double blind experiment.
Ablocked design experiment.
Answer:
(B) An uncontrolled experiment.
Step-by-step explanation:
In the case of an uncontrolled experiment here all participants are provided the similar treatment and there should be no comparison oppose to any group i.e. controlled
Since in the given situation, there are similar diets are provided to 20 volunteers and it can be that the cholesterol level is decreased after particular time period,
Hence, it is an uncontrolled experiment.
Thus, option B is correct.
Jenny used plastic cone shaped cups to serve punch. The cups were 6 inches in diameter and inches tall. What was the volume of each cup?
Answer:
47.14 in³
Step-by-step explanation:
Here is the complete question
Jenny used plastic cone shaped cups to serve punch. The cups were 6 inches in diameter and 5 inches tall. What was the volume of each cup?
Volume of a cone = [tex]\frac{1}{3}[/tex]πr²h
π = 22/7
Radius = diameter / 2 = 6 /2 = 3 inches
(1/3) x (3^2) x (22/7) x 5 = 47.14 in³
1. Select all the expressions that are equivalent to 4 - x
4 + x
-4 + x
-x + 4
x - 4
4 + -x
Answer:
I think this is the answer
4+–x
–x+4
the mean of "n" numbers is "x" . if one more is added the mean is "y" . write an algebraic expression for the value of the number added?
Answer:
yn +y -xn
Step-by-step explanation:
Mean= sum of numbers ÷number of numbers
x= sum of n numbers ÷n
Multiply both sides by n:
xn= sum of n numbers
sum of n numbers= xn -----(1)
Let the number added be a.
After a has been added,
y= (sum of n numbers +a) ÷(n+1)
Multiply both sides by (n +1):
y(n +1)= sum of n numbers +a
sum of n numbers= y(n +1) -a -----(2)
Substitute (1) into (2):
xn= y(n +1) -a
Expand:
xn= yn +y -a
a= yn +y -xn
Let's check!
Let the numbers be 1, 2, 3 and 4.
mean, x= 10 ÷4= 2.5
n= 4
Let the new number added, a, be 7.
a= 7
mean, y= 17 ÷5= 3.4
a= yn +y -xn
a= 3.4(4) +3.4 -2.5(4)
a= 7
Thus, the expression is true.
Which value of x makes x-3/4 + 2/3=17/12 true?
Answer:
x = 3/2
Step-by-step explanation:
x- 3/4 + 2/3 = 17/12
x = 17/12 + 3/4 -2/3
x = 3/2
A cuboid has 4 rectangular faces and 2 square faces. Each rectangular face measures 8 cm by 6 cm. Find the two possible values for the surface area of the cuboid.
pls give me answer with steps
Answer:
320 cm² or 264 cm²
Step-by-step explanation:
first, the rectangular face area is 4 faces at 8 x 6 = 192 cm²
the 2 square faces will be either 8 x 8 or 6 x 6.
If 8 x 8, then the SA will be 192 + (2 x 8 x 8 ) = 320 cm²
If 6 x 6, then the SA will be 192 + (2 x 6 x 6 ) = 264 cm²