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3 years ago

What is the sum of 3(x + 3) and -2(x - 5)? A. X-2 B. x-1 C. X + 8 D. X + 19

Mathematics

1 answer:

Umnica [9.8K]3 years ago

7 0

The answer is actually d lol the idiot above me was right

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What does 4.23×9 equal

nata0808 [166]

4.23 times 9 equals 38.07 :)

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3 years ago

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Write 84 as a product of prime numbers

hoa [83]

Factors of 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84. Prime factorization: 84 = 2 x 2 x 3x 7 which can also be written (2^2) x 3 x 7.

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4 years ago

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Given points A (1, 2/3), B (x, -4/5), and C (-1/2, 4) determine the value of x such that all three points are collinear

AlladinOne [14]

Answer:

$x=\frac{83}{50}$

Step-by-step explanation:

we know that

If the three points are collinear

then

$m_A_B=m_A_C$

we have

A (1, 2/3), B (x, -4/5), and C (-1/2, 4)

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

step 1

Find the slope AB

we have

$A(1,\frac{2}{3}),B(x,-\frac{4}{5})$

substitute in the formula

$m_A_B=\frac{-\frac{4}{5}-\frac{2}{3}}{x-1}$

$m_A_B=\frac{\frac{-12-10}{15}}{x-1}$

$m_A_B=-\frac{22}{15(x-1)}$

step 2

Find the slope AC

we have

$A(1,\frac{2}{3}),C(-\frac{1}{2},4)$

substitute in the formula

$m_A_C=\frac{4-\frac{2}{3}}{-\frac{1}{2}-1}$

$m_A_C=\frac{\frac{10}{3}}{-\frac{3}{2}}$

$m_A_C=-\frac{20}{9}$

step 3

Equate the slopes

$m_A_B=m_A_C$

$-\frac{22}{15(x-1)}=-\frac{20}{9}$

solve for x

$15(x-1)20=22(9)$

$300x-300=198$

$300x=198+300$

$300x=498$

$x=\frac{498}{300}$

simplify

$x=\frac{83}{50}$

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4 years ago

If your cell phone bill was $67.85 and there is a 7.5% late fee how much will your bill be?

dedylja [7]

$67.85 \times .075 = 5.08875 \\ 67.85 + 5.08875 = 72.94$
bill is $72.94

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4 years ago

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For what value of c will this function have one zero? f(x) = X^2 +c

Phoenix [80]

X² + c is actually a quadratic function.

And x² + c = 0, it usually has two zeros which are solutions.

But for when c = 0,

x² + c = 0

x² + 0 = 0

x² = 0

Taking the square root of both sides.

x = 0. Here it only has one zero.

So the function x² + c, only has one root for c = 0.

6 0

3 years ago