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gladu [14]
3 years ago
14

What percent us 28 of 70?

Mathematics
1 answer:
RoseWind [281]3 years ago
3 0
   
\displaystyle\\
 \frac{28}{70} ^{(7} =  \frac{4}{10} = \frac{40}{100} = \boxed{40\%}



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Please help me with this problem!
Oksanka [162]
(25-y) ^2-y^2=25
y=12
x=25-12
x=13

(13,12)
7 0
3 years ago
Show that x + y : x - y= 3 : 2
insens350 [35]

Answer:

x + y : x - y = (5/2+1/2) : (5/2-1/2)

x + y : x - y = 3 : 2

Therefore,  x + y : x - y= 3 : 2 is proved.

Step-by-step explanation:

Given

x + y : x - y = 3 : 2

As

x + y = 3

x - y = 2

Solving to find x and y

\begin{bmatrix}x+y=3\\ x-y=2\end{bmatrix}

x-y=2

-

\underline{x+y=3}

-2y=-1

\begin{bmatrix}x+y=3\\ -2y=-1\end{bmatrix}

solve for y

-2y=-1

Divide both sides by 2

\frac{-2y}{-2}=\frac{-1}{-2}

y=\frac{1}{2}

\mathrm{For\:}x+y=3\mathrm{\:plug\:in\:}y=\frac{1}{2}

x+\frac{1}{2}=3

x+\frac{1}{2}-\frac{1}{2}=3-\frac{1}{2}

x=\frac{5}{2}

so

x=\frac{5}{2},\:y=\frac{1}{2}

Thus,

x + y : x - y = (5/2+1/2) : (5/2-1/2)

x + y : x - y = 3 : 2

Therefore,  x + y : x - y= 3 : 2 is proved.

7 0
3 years ago
A. 28.1 cm squared <br> B. 3.8 cm squared <br> C. 11.3 cm squared <br> D. 56.2 cm squared
Colt1911 [192]

Answer:

A. 28.1 cm^2

Step-by-step explanation:

a = bh

a = (7.6)(3.7)

a = 28.12 cm^2

a = 28.1 cm^2

6 0
3 years ago
Divide use partial quotients 156 divided by 13
Alexeev081 [22]

    

      156÷13

  13 goes into 15 once

so under the 156 put 13 under 15 left with 2 bring down the 6 to make it 26

13 goes into 26 2 times

 so under where you wrote 26 put 26 then 26-26=0

so your answer is 12





8 0
3 years ago
Read 2 more answers
Suppose that ln 2=a and ln3=b. Use properties of logarithms to write each logarithm in terms of a and b
Anettt [7]
The solution to the problem is as follows:

<span>ln(0.5) could be written as ln(2) - ln(2) - ln(2) = a - a - a = -a 
</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
3 0
3 years ago
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