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3 years ago

The width of the figure below is 5 units. The perimeter of the figure is 18 units. What is the length of the figure in units?

Mathematics

2 answers:

Talja [164]3 years ago

4 0

The perimeter is all sides length added together. You can make an equation:5+5+x+x where x is the length.
5+5=10 18-10=8 There is two sides so you do eight divided by two
The length is 4

timurjin [86]3 years ago

3 0

Perimeter = 18 units.
width = 5 units.

Perimeter = 2*(l + w)

18 = 2*( l + 5)

18/2 = l + 5

9 = l + 5

l + 5 = 9

l = 9 - 5 = 4

Length = 4 units.

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Solve the formula -8x-3y=-19 for y

Ann [662]

Answer:y = (19 - 8x)/3

Step-by-step explanation:

add 8x to both sides ,

-3y = -19+8x

dividing both sides by -3

y = (19 - 8x)/3

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3 years ago

DURING A REGULAR HALF-HOUR TV SHOW THERE ARE 8 MINUTES OF COMMERCIALS. IF EACH COMMERCIAL IS 0.25 MINUTES LONG HOW MANY COMMERCI

kirza4 [7]

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3 years ago

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Which number is irrational?<br><br> A.0.3 B. C.0.777... D.0.454545…

Savatey [412]

Each of A, C, and D are rational, so presumably B is the answer here.

A is rational, since $10\times0.3=3$ , so $0.3=\dfrac3{10}$ .

C is also rational. If $x=0.777\ldots$ , then $10x=7.777\ldots$ . This would mean $10x-x=9x=7$ , and so $x=\dfrac79$ .

D is rational by a similar argument. If $x=0.4545\ldots$ , then $100x=45.4545\ldots$ . So, $100x-x=99x=45$ , which means $x=\dfrac{45}{99}=\dfrac5{11}$ .

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3 years ago

2) You can buy 3 apples at the Quick Market for $1.05. You can buy 5 of the

Alexus [3.1K]

Answer:

Quick Market

Step-by-step explanation:

You need to set up the problem in fraction form or 3/1.05 and 5/1.15

Then you need for the numbers to have the same denominator.

After doing that the fraction would look like 114/39.9 for Quick Market and 173.48/39.9 for Stop and Save.

So Quick Market costs less.

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4 years ago

Simplify completely. Leave your answer in exponential form:

stich3 [128]

Answer:

${2}^{3} \times {4}^{3} \times 9$

Step-by-step explanation:

Using the division rule when dealing with exponents

$\frac{b {}^{h} }{b {}^{j} } = b {}^{h - j}$

meaning that when we divide exponents that have the same base but different powers we can subtract the power of the bottom exponent from the top exponet.

so using that we are going to do 2, 4 and 9

$\frac{2 {}^{8} }{ {2}^{5} } = {2}^{8 - 5 = 3 \: \: \: \: \: 2 {}^{3} }$

$\frac{ {4}^{4} }{ {4}^{1} } = {4}^{4 - 1} \: \: \: {4}^{3}$

$\frac{9 {}^{9} }{ {9}^{8} } = {9}^{9 - 8} = 9 {}^{1}$

Combine all the terms and we get

${2}^{3} \times 4 {}^{3} \times {9}$

4 0

3 years ago