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2 years ago

Write the pair of fractions 3/10 and 1/2 as a pair of fractions with a common denominator

1 answer:

7 0

The commen denominator for 10 and 2 would be 10. so 3/10 will stay the same ... and now we change the 1/2 to a fraction that has its denominator as 10. so the new fractions would be ... 3/10, and 5/10.

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Solve the initial value problem yy′+x=x2+y2‾‾‾‾‾‾‾√ with y(1)=8‾√. To solve this, we should use the substitution u= x^2+y^2 help

leva [86]

Looks like the equation is

$yy'+x=\sqrt{x^2+y^2}$

Substitute $u(x)=x^2+y(x)^2$ , so that $u'=2x+2yy'$ . Then the equation is the same as

$\dfrac{u'-2x}2+x=\sqrt u\implies u'=2\sqrt u\implies\dfrac{\mathrm du}{2\sqrt u}=\mathrm dx$

Integrate both sides to get

$\sqrt u=C\implies\sqrt{x^2+y^2}=C$

Given that $y(1)=\sqrt8$ , we have

$\sqrt{1^2+(\sqrt8)^2}=C\implies C=3$

so the solution is

$\sqrt{x^2+y^2}=3$

7 0

2 years ago

In two or more complete sentences write and solve an equation for the situation and explain how you will solve the equation. Fif

miv72 [106K]

We conclude that the starting average grade is 79.17%

<h3>How to write the equation and solve it?</h3>

There are 50 students, let's say that the grades are measured between 1% and 100%.

And the average grade of the 50 students is A.

We know that after it increased by 20%, the average of the grades is 95.

Then we just need to solve the percentage equation:

95 = A*(1 + 20%/100%) = A*(1.2)

95/1.2 = A = 79.17

We conclude that the starting average grade is 79.17%

If you want to learn more about percentages:

brainly.com/question/843074

#SPJ1

6 0

1 year ago

Jim was president of a big company for 9 years. He earned $370,704 for each year that he was president. How much did Jim earn in

Fiesta28 [93]

Answer:

Jesus is always the answer

Step-by-step explanation:

Jesus

The

Way

The

Truth

And

The

Life

8 0

3 years ago

Read 2 more answers

Select all expressions that are equivalent to 2+y+y+y+y+y+3?

ryzh [129]

I can’t see your choices, but this equation can be simplified to 5y + 5.

If you add the choices as a comment, I’m happy to help more.

7 0

3 years ago

Action hero mambo ('the moose with no mercy') has just finished for film for his latest movie. Due to his unique acting style he

solmaris [256]

A. £549 376 / 4 = £137344 per word
B. £549 376 / 16 = £34336 per letter
C. £549 376 / 37 = £14848 per letter
D. £549 376 / 512 = £ 1073

7 0

3 years ago