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Pani-rosa [81]
3 years ago
9

Mary is 21 years old. Her age is 9 years more than 3 times Henry’s age. Which equation can be used to determine x, Henry’s age i

n years?
Mathematics
1 answer:
nika2105 [10]3 years ago
4 0

Answer:4

Step-by-step explanation:

21=3x+9

12=3x

X=4

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Write the slope-intercept form of the equation of each line given the slope and y-intercept.
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Answer:

4b. −6x + y = −4

4a. 7x + 4y = −12

3b. y = ½x + 3

3a. y = −6x + 5

2b. y + 2 = −⅔(x + 3)

2a. y - 3 = ⅘(x - 5)

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Step-by-step explanation:

4.

Plug the coordinates into the Slope-Intercept Formula first, then convert to Standard Form [Ax + By = C]:

b.

2 = 6[1] + b

6

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a.

4 = −7⁄4[-4] + b

7

−3 = b

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+7⁄4x +7⁄4x

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__________________________________________________________

3.

Plug both coordinates into the Slope-Intercept Formula:

b.

5 = ½[4] + b

2

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a.

−1 = −6[1] + b

−6

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* Parallel lines have SIMILAR <em>RATE OF CHANGES</em> [<em>SLOPES</em>].

__________________________________________________________

2.

b. y + 2 = −⅔(x + 3)

a. y - 3 = ⅘(x - 5)

According to the <em>Point-Slope Formula</em>, <em>y - y₁ = m(x - x₁)</em>, all the negative symbols give the OPPOSITE TERMS OF WHAT THEY REALLY ARE, so be EXTREMELY CAREFUL inserting the coordinates into the formula with their CORRECT SIGNS.

__________________________________________________________

1.

b. y = -x + 5

a. y = 5x - 3

Just write out the Slope-Intercept Formula as it is given to you.

I am joyous to assist you anytime.

3 0
3 years ago
2. Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard deviation of 15. a. Sketch the
gogolik [260]

Answer:

0.0010,0.2743

Step-by-step explanation:

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8 0
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What is the exact volume of the cylinder? Cylinder with height of 6 inches and radius of 3 inches. 324π in3 18π in3 36π in3 54π
Afina-wow [57]
Volume of a cylinder is pi*r^2*h where r = radius and h = height
so 3^2*6*pi = 9*6*pi = 54pi

54 pi is the answer. mark me brainliest please!
8 0
3 years ago
Read 2 more answers
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