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3 years ago

If it is 78°F in Memphis and -14°F

Mathematics

1 answer:

Molodets [167]3 years ago

5 0

Answer:

There is a 92°F difference between the two cities.

Step-by-step explanation:

Since you are finding the difference of temperatures between the two cities, you need to subtract -14 from 78. It looks like 78-(-14). Since you are subtracting a negative number, the equation becomes 78+14. 78+14 is 92.

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What is the value of X

alexdok [17]

Answer:

$x=12$

Step-by-step explanation:

We have been given a graph of similar triangles. We are asked to find the value of x.

Since we know that corresponding sides of similar triangles are always in same proportion, so we will use proportions to find the length of x.

$\frac{3}{x+3}=\frac{4}{16+4}$

$\frac{3}{x+3}=\frac{4}{20}$

Upon cross multiplying our equation we will get,

$4*(x+3)=3(20)$

Upon distributing 4 we will get,

$4x+12=60$

Let us subtract 12 from both sides of our equation.

$4x+12-12=60-12$

$4x=48$

Upon dividing both sides of our equation by 4 we will get,

$\frac{4x}{4}=\frac{48}{4}$

$x=12$

Therefore, the value of x will be 12.

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