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3 years ago

The ratio of boys to girls in ms cunninghams class is 2 to 3 there is 18 girls in the class

Mathematics

1 answer:

forsale [732]3 years ago

8 0

12 because you multiply each side by six

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(40 points) Manuel and Jerry are trying to find the value of the expressions (5+7)2. Jerry plans to first square 5,then square 7

Vlada [557]

Manual is correct due to 5^2 and 7^2 being 74 in total while 5+7 is 12 being squared gives you 144 which is the correct answer.

6 0

3 years ago

What are the values of x and y?

adoni [48]

Answer:

Step-by-step explanation:

hello :

use pytagor-rule :

triangle ABC : (x+15)² =17²+y²....(*)

triangle BDC : y² = x²+8²....(**)

by (**) put the value of y² in (*) :

(x+15)² = 17²+x²+8²

x²+30x+15² = 17²+x²+18²

30x +225 = 289+64

30x = 128

x= 128/30

x= 64/15

put this value in (**) calculate y² ......continu

4 0

4 years ago

Ifn || m, find the value of x and the value of y.

Marat540 [252]

Answer: Option C

$y=5$ , $x=10$

Step-by-step explanation:

If the lines m and n are parallel then the large triangle and the small triangle are similar triangles, because they have equal angles.

By definition for similar triangles it is satisfied that if they have sides of length a, b, c and a', b', c' then:

$\frac{a}{a'}=\frac{b}{b'} =\frac{c}{c'}$

In this case

$a = 12\\a' = 4\\c = 15\\c' = y$

So:

$\frac{12}{4}=\frac{15}{y}$

Now solve the equation for the variable y

$3=\frac{15}{y}$

$y=\frac{15}{3}$

$y=5$

We know that

$x+y=15$ and $y=5$

Then

$x+5=15$

$x=10$

Finally the answer is:

$y=5$ , $x=10$

5 0

3 years ago

3.000052 in scientific notation

erica [24]

3.000052 x 0

The scientific notation for numbers between 1 and 10 is the same as regular notation.

5 0

3 years ago

Simplify 3y - 5(y + 2) completely

xeze [42]

Answer:

Step-by-step explanation:

3y (-5)(y+2)

3y(-5y-10)

3y-5y-10

-2y-10

-2y-10

7 0

3 years ago

Read 2 more answers