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3 years ago

7

3/2+2x/5=7/10 these are fraction busters but I don't know what I'm supposed to do and what the answer is?

1 answer:

MAXImum [283]3 years ago

3 0

<span>3/2+2x/5=7/10

We simplify the equation to the form, which is simple to understand
<span>3/2+2x/5=7/10

Simplifying:
<span>+1.5+2x/5=7/10

Simplifying:
<span>+1.5 + 0.4x=7/10

Simplifying:
<span>+1.5 + 0.4x=0.7

We move all terms containing x to the left and all other terms to the right.
<span> + 0.4x=0.7-1.5

We simplify left and right side of the equation.
<span> + 0.4x=-0.8

We divide both sides of the equation by 0.4 to get x.
<span>x=-2

</span></span></span></span></span></span></span></span>

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see the attached figure to better understand the problem

we have that

$cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units$

Step 1

<u>Find the value of AC</u>

we know that

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substitute the values in the formula

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Step 2

<u>Find the value of BC</u>

we know that

in the right triangle ABC

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Step 3

<u>Find the value of BD</u>

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

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substitute the values

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