All categories

4 years ago

What percent is 50 of 40?

Mathematics

1 answer:

gayaneshka [121]4 years ago

6 0

50% of 40 is 20.
40/2 =50.
Just divide the number by 2 anytime it asks for 50%.

You might be interested in

Solve the equation for b: A= (1/2)(b)(h)

fiasKO [112]

Answer:

2A/h = b

Step-by-step explanation:

A= (1/2)(b)(h)

Multiply each side by 2

2A = 2*1/2 *b*h

2A = bh

Divide each side by h

2A/h = bh/h

2A/h = b

5 0

3 years ago

Read 2 more answers

(2,5) (7,9) (3,9) (5,8) is it a function

NeX [460]

Answer:

(2,5) (7,9) (3,9) (5,8)

The relation is a function.

4 0

3 years ago

A sample of 8 new models of automobiles provides the following data on highway miles per gallon. Highway Miles Model Per Gallon

Furkat [3]

Answer:

The point estimate for the mean is 29.5 miles per gallon and the standard deviation is 5.9

Step-by-step explanation:

The formula por the point estimate of the mean is:

$mean(x) = \frac{x1+x2+x3+...+xn}{n}$

And for the standard deviation:

$desv(x)=(\frac{1}{n-1}sum(xi^{2} - n*x^{2} ))^{1/2}$

So for the mean:

$mean(x)=\frac{33.6+26.8+20.2+38.7+35.1+28.0+26.2+27.6 }{8} \\\\mean(x)=\frac{236.2}{8} \\\\mean(x)=29.5$

And for the standard deviation:

$desv(x)=(\frac{1}{8-1} ((33.6-29.5)^{2} +(26.8-29.5)^{2} +(20.2-29.5)^{2} +(38.7-29.5)^{2} +(35.1-29.5)^{2} +(28-29.5)^{2} +(26.2-29.5)^{2} +(27.6-29.5)^{2})^{1/2} \\\\desv(x)=(\frac{1}{8-1} ((4.1)^{2} +(-2.7)^{2} +(-9.3)^{2} +(9.2)^{2} +(5.6)^{2} +(-1.5)^{2} +(-3.3)^{2} +(-1.9)^{2})^{1/2} \\\\desv(x)=\sqrt{\frac{243.3}{7}} \\\\desv(x)=\sqrt{34.7} \\\\desv(x)=5.9$

5 0

4 years ago

2x+3=x+x+3<br> Show your work

Nitella [24]

Step-by-step explanation:

2x+3=x+x+3

add the X's on the right side together.

2x+3=2x+3

subtract 2x from both sides

3=3

subtract 3 from both sides

0=0

the statement is true for any value of x

5 0

3 years ago

Answer for both boxes please :)

Jet001 [13]

Answer:

Concept: Linear systems

We will use the method of elimination which is essentially solving for x or y first and eliminating the other variable.
Hence y=2/3x-3/25
5x+3(2/3x-25/3)
Expand
5x+2x-25
7x-25=0
7x=25
x=25/7

7 0

3 years ago