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3 years ago

Which of the following represents the additive inverse of 12

Mathematics

1 answer:

kap26 [50]3 years ago

3 0

Answer:

what are the options?

Step-by-step explanation:

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A snow storm dumped 18 7/10 inches of snow in a 12 hour period. How many inches were falling per hour

scoundrel [369]

All you have to do for this is take your inches (18 7/10 or 18.7) and divide it by the number of hours (12) which makes 1.56in per hour.

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3 years ago

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The perimeter of a rectangle is 42 inches, and its area is 110 square inches. find the length and width of the rectangle.

lorasvet [3.4K]

$p = 2w + 2l$ $p = 42$
$a = l * w$ $a = 108$

You want to make either the length or width variable (I chose the width variable to be by itself. It doesn't matter) by itself by:

Divide both sides by 2.
(p) ÷ 2 = (2w + 2l) ÷ 2
$2's$ $cancel$ $out$
$\frac{p}{2} = w + l$

Subtract both sides by either length or width depending on what variable you chose to make by itself (in this case I subtracted the length variable because I wanted the width variable by itself).
$\frac{p}{2} - l = w + l - l$
$l's$ $cancel$ $out$
p/2 - l = w

$a = l * w$

You replace w with the equation above p/2 - l = w
$a = l( \frac{p}{2} - l)$

Multiply out the L.
$a = \frac{p}{2}l - l^{2}$

Plug in all your numbers a = 110 and p = 42
$110 = \frac{42}{2}l - l^{2}$
$110 = 21l - l^{2$

Move everything to the left side so $l^{2}$ would be positive (makes the equation easier when $l^{2}$ is positive).
$l^{2} - 21l + 110 = 0$

Factor.
$(l -10)(l-11) = 0$

Make each parenthesis set equal to 0.
$l-11=0$ $l-10=0$

Add.
$l = 11$ $l = 10$

By doing this you solve for both the width and length so the answer is:
w = 11 L = 10

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3 years ago

What is the value of f if f + I-3 11/12 = 18

astra-53 [7]

Solve for f:(i - 47/12) + f = 18
(i - 47/12) + f = f + (-47/12 + i):
f + (-47/12 + i) = 18
Subtract -47/12 + i from both sides:
Answer: f = 263/12 - i

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3 years ago

Barbara has nine stuffed animals Trish has three times as many stuffed animals as Barbara how many stuffed animals does Trish Ha

n200080 [17]

Trish has 3 times 9 stuffed animals, 27.

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3 years ago

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Mixed number fraction 7 1/5+3 2/5

andrezito [222]

Answer: 10 3/5

Step-by-step explanation: 7+3 = 10