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3 years ago

X-intercept and y-intercept of 9.3x+4.2y+3.9=0

Mathematics

1 answer:

hoa [83]3 years ago

7 0

Answer:

y intercept = -0.93

x intercept = -0.42

Step-by-step explanation:

To get x intercept, substitute y for 0 and solve for x.

To get y intercept, substitute x for 0 and solve for y.

X intercept:

9.3x + 4.2y + 3.9 = 0

9.3x + 4.2(0) + 3.9 = 0

9.3x + 3.9 = 0

Subtract 3.9 to get it on the other side

9.3x + 3.9 - 3.9 = 0 - 3.9

9.3x = -3.9

Divide 9.3 to get x by itself

(9.3x) / (9.3) = (-3.9) / (3.9)

x = -0.419355

Since there are some extra numbers, I will round it to the nearest hundredth to make it easier

-0.419355 = -0.42

Y intercept:

9.3x + 4.2y + 3.9 = 0

9.3(0) + 4.2y + 3.9 = 0

4.2y + 3.9 = 0

Subtract 3.9 to get it on the other side

4.2y + 3.9 - 3.9 = 0 - 3.9

4.2y = -3.9

Divide 4.2 to get y by itself

(4.2x) / (4.2) = (-3.9) / (4.2)

x = -0.928571

Round answer to nearest hundredths

-0.928571 = -0.93

Notes:

If your answer is an extended decimal number, round it to the nearest hundredths to make it easier

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Option A: $\sqrt{xy^9}$

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Thus, the expression $x\sqrt{y^9}$ is not equivalent to the expression $xy^{\frac{2}{9}}$

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