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3 years ago

The variables y and x have a proportional relationship, and y = 5 when x = 4.

Mathematics

1 answer:

MrRissso [65]3 years ago

3 0

If the variables y and x have a proportional relationship, we have

$xy=k$

Since (x,y)=(4,5) is a valid pair, we know that

$xy=20$

So, if y = 8, we have

$8x=20 \iff x=\dfrac{20}{8}=\dfrac{5}{2}$

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In ΔRST, ∠R = 85° and ∠S = 52°. Find ∠T.

fenix001 [56]

Answer:

43°

Step-by-step explanation:

A triangle has a total angle of 180° and we can use it to find the answer.

The attachment is a visualization of the triangle.

In order to find angle T, we can use the triangle formula to find t.

${180}^{o} = r + s + t$

By substituting r and s, we will get

${180}^{o} = {85}^{o} + {52}^{o} + t$

Hence, we can find T, which is

$t = {180}^{o} - {85}^{o} - {52}^{o} = {43}^{o}$

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2 years ago

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Vsevolod [243]

Answer:

$4r-39>-43$

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$\boxed{r>-1}$

______________________

$8x+31$

$8x+31-31$

$8x$

$\frac{8x}{8}$

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2 years ago

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Answer:

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Step-by-step explanation:

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