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3 years ago

Which expression is NOT equivalent to the others?

Mathematics

1 answer:

olchik [2.2K]3 years ago

3 0

Answer: A

Step-by-step explanation:

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A rectangle has a perimeter of 84 meters. One dimension is 7 meters. How long is

Lemur [1.5K]

Answer:

The unknown dimension is 35

Step-by-step explanation:

The perimeter of a rectangle is l+l+w+w or 2l+2w (l=length, w=width)

$l+l+w+w=84$

$7+7+w+w=84$

$14+w+w=84$

then we subtract 14 from 84

$w+w=70$

$2w=70$

$\frac{70}{2}=35$

$w=35$

Let's check our answer

$35+35+7+7=84$

<u>Hope this helps :-)</u>

6 0

3 years ago

Which number line correctly shows -3 - 1.5

SVETLANKA909090 [29]

Answer:i think its the first one

Step-by-step explanation:

Nothing else makes sense

6 0

4 years ago

Read 2 more answers

Pls help me with number

vredina [299]

Answer:

Total people = 240

Step-by-step explanation:

Let the total number of people by 'x'.

$\sf \text{Number of men =$ \dfrac{1}{4}*x$} \\$

$\sf \text{Number of women =$\dfrac{1}{3}x$}$

Number of children = 100

When we subtract the total number of men and women from the total people 'x', we get the number of children.

$\sf x - \left(\dfrac{1}{4}x+\dfrac{1}{3}x\right)= 100\\\\x - \left(\dfrac{1*3}{4*3}x+\dfrac{1*4}{3*4}x\right)=100\\\\$

$x- \dfrac{4+3}{12}x=100\\\\x - \dfrac{7}{12}x = 100\\\\ \dfrac{12}{12}x-\dfrac{7}{12}x = 100\\\\ \dfrac{5}{12}x=100\\$

$\sf x = 100*\dfrac{12}{5}\\$

x = 20 * 12

x = 240

<h3> Total number of people = 240</h3>

7 0

2 years ago

Keelah's clothing store buys coats for $50 and then sells them for $80 .what is the percent of mark up on the price of the coat

meriva

I would say 10% but I'm not really sure

3 0

3 years ago

What is 78,000,000 in scientific notation

fomenos

Answer:

7.8×10⁷

Step-by-step explanation:

You want to keep the coefficient (7.8) between 1 and 10 to achieve a normalized notation. Otherwise 78×10⁶ would also be an option.

3 0

3 years ago

Read 2 more answers