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4 years ago

A student answered 13 out of 20 correct on a test what percentage did he not get correct

Mathematics

1 answer:

nirvana33 [79]4 years ago

5 0

35% he got incorrect

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Solve {-20-5x}-70=-40

Artemon [7]

Answer:

x = -10

Step-by-step explanation:

6 0

3 years ago

Please show your work with each expression. Simplify.

Alina [70]

(replace the variables) 6(9)-2(5)^2
(simplified) 54-10^2.... 54-100=-46

6 0

4 years ago

Can anyone help me with these two plz

Evgen [1.6K]

Answer:

Part 1) The scale factor is $1.5$

Part 2) The altitude QS is $4\ units$

Part 3) The scale factor is $\frac{2}{3}$

Part 4) The value of x is $12\ units$

Part 5) The perimeter of ABCDE is $46\ units$

Step-by-step explanation:

Part 1) Find the scale factor of triangle TQR to triangle NQP

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

Let

z-----> the scale factor

$z=\frac{NP}{RT}$

substitute the values

$z=\frac{24}{16}=1.5$

Part 2) Find the length of the altitude QS

we know that

To find the altitude QS, divide the altitude of triangle NQP by the scale factor

$QS=\frac{6}{1.5}=4\ units$

Part 3) Find the scale factor of FGHJK to ABCDE

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

Let

z-----> the scale factor

$z=\frac{AB}{FG}$

substitute the values

$z=\frac{10}{15}=\frac{2}{3}$

Part 4) Find the value of x

we know that

The value of x is equal to multiply the length side FK by the scale factor

$AE=FK(z)$

substitute the values

$AE=18(2/3)=12\ units$

Part 5) Find the perimeter of ABCDE

we know that

If two figures are similar, then the ratio of its perimeters is equal to the scale factor

Let

z-----> the scale factor

x-----> the perimeter of ABCDE

y-----> the perimeter of FGHJK

$z=\frac{x}{y}$

we have

$z=\frac{2}{3}$

$y=15+9+12+15+18=69\ units$

substitute the values

$z=\frac{x}{y}$

$x=(z)(y)=\frac{2}{3}(69)=46\ units$

6 0

4 years ago

R+4 at r=13 help me

DaniilM [7]

Answer: 17

Step-by-step explanation:

you replace the "r" with 13

and you just do

13+4

3 0

3 years ago

Read 2 more answers

What is the perimeter of rectangle A?

Ivan

It’s not feet is numbers
Triangle a+b+c
Rectangle 2{l+w}

8 0

3 years ago