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2 years ago

How to solve the sum of two numbers is 13. twice the larger increased by three times the smaller is 31. find the numbers?

Mathematics

1 answer:

worty [1.4K]2 years ago

8 0

13 divided by 2 is 6.5 and 31 divide by 2 is 15.5 I hope this helped

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Can someone please help me ?

Aliun [14]

Answer:

5x+3y=6

Step-by-step explanation:

Use the slope intercept form then rearrange

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2 years ago

What is the answer to, one half of 9?

GREYUIT [131]

Answer:

4.5

Step-by-step explanation:

One half of 9 = 9/2 = 4.5

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1 year ago

List multiples to find LMC of 27 and 45

PtichkaEL [24]

Answer:

135

Step-by-step explanation:

I think you mean the LCM instead of LMC. LCM stands for Least Common Multiple. Anyway, some of the multiples of 27 are 27, 54, 81, 108, and 135. Some multiples for 45 are 45, 90, 135. We can see here that 27 and 45 share the mutiple of 135 which is the first number they have in common.

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2 years ago

Kristie has taken five tests in science class. The average of all five of Kristie's test scores is 94. The average of her last t

Bingel [31]

Answer: The average of the first two test scores is 97.

Step-by-step explanation: Given that Kristie has taken five tests in science class. The average of all five of Kristie's test scores is 94 and the average of her last three test scores is 92.

We are to find the average score of her first two tests.

Let a1, a2, a3, a4 and a5 be teh scores of Kristle in first , second, third, fourth and fifth tests respectively.

Then, according to the given information, we have

$\dfrac{a1+a2+a3+a4+a5}{5}=94\\\\\Rightarrow a1+a2+a3+a4+a5=94\times5\\\\\Rightarrow a1+a2+a3+a4+a5=470~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

and

$\dfrac{a3+a4+a5}{3}=92\\\\\Rightarrow a3+a4+a5=92\times3\\\\\Rightarrow a3+a4+a5=276~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)$

Subtracting equation (ii) from equation (i), we get

$(a1+a2+a3+a4+a5)-(a3+a4+a5)=470-276\\\\\Rightarrow a1+a2=194\\\\\Rightarrow \dfrac{a1+a2}{2}=\dfrac{194}{2}\\\\\Rightarrow \dfrac{a1+a2}{2}=97.$

Thus, the average of the first two test scores is 97.

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3 years ago

Problem 3.2

vovangra [49]

Answer:

it is Circumference this is my answer

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2 years ago