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3 years ago

Solve for y .|y| +8=18

Mathematics

2 answers:

ANEK [815]3 years ago

8 0

Answer:

y=10

Step-by-step explanation:

ozzi3 years ago

4 0

Answer:

y = ± 10

Step-by-step explanation:

The absolute value function always gives a positive value, that is

| - a | = | a | = a

Given

| y | + 8 = 18 ( subtract 8 from both sides )

| y | = 10 , then

y = 10 or y = - 10

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Which number(s) below belong to the solution set of the inequality? Check all that apply.

ValentinkaMS [17]

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The circumference of a circle is 65?. In terms of pi, what is the area of the circle?

iVinArrow [24]

Answer:

1056.25π square units

Step-by-step explanation:

A few formulas an definitions which will help us:

(1) $\pi=\frac{c}{d}$ , where c is the circumference of a circle and d is its diameter

(2) $A=\pi r^2$ , where A is the area of a circle with radius r. To put it in terms of d, remember that a circle's diameter is simply twice its radius, or mathematically, (3) $d=2r \rightarrow r=\frac{d}{2}$ .

We can rearrange equation (1) to put d in terms of π and c, giving us (4) $d = \frac{c}{\pi}$ , and we can make a few substitutions in (2) using (3) and (4) to get use the area in terms of the circumference and π:

$A=\pi r^2\\=\pi\left(\frac{d}{2}\right)^2\\=\pi\left(\frac{d^2}{4}\right)\\=\pi\left(\frac{(c/\pi)^2}{4}\right)\\=\pi\left(\frac{c^2/\pi^2}{4}\right)\\=\pi\left(\frac{c^2}{4\pi^2}\right)\\\\=\frac{\pi c^2}{4\pi^2}\\ =\frac{c^2}{4\pi}$

We can now substitute c for our circumference, 65, to get our answer in terms of π:

$A=\dfrac{65^2}{4\pi}=\dfrac{4225}{4\pi}=1056.25\pi$

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3 years ago

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Solve for a. r=ab/a+b+c

Marta_Voda [28]

Answer:

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2 years ago

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andre [41]

Answer:

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Step-by-step explanation:

y = –3x – 2,

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We know the value of y, y=7

Substitute into the first equation

7 = –3x – 2

Add 2 to each side

7+2 = –3x – 2+2

9 = -3x

Divide each side by -3

9/-3 = -3x/-3

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3 years ago

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What is the absolute value of -45/6. I need serious help

icang [17]

Answer:

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Step-by-step explanation:

The absolute value of a number is just its distance from zero. In other words, if it's negative, the absolute value would make the number positive. This makes the absolute value $\frac{45}{6}$ . Now, reduce to get $\frac{15}{2}$ .

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1 year ago

Solve for y .|y| +8=18​

Solve for y .|y| +8=18