3 years ago

Which of the following are mathematical sentences? Check all that apply.

Mathematics

2 answers:

zepelin [54]3 years ago

6 0

C,d,e i think and hope this could help you

shutvik [7]3 years ago

6 0

A and F are not math'l sentences; they're just numbers.

B, C, D and E all comment on the equality of two sides of given equations and are thus math'l sentences. For example: "10 times some number r equals 40."

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Answer two questions about Systems AAA and BBB: System AAA \text{\quad}start text, end text System BBB \begin{cases}x-7y=-3\\\\4

MrRa [10]

Answer:

B: swap the order of the equations

(Yes) they have the same solution

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Hector spent $41.75 for 2 DVDs that cost the same amount. The sales tax on his purchase was $3.15. Hector also used a coupon for

kykrilka [37]

Given:

Amount spent on 2 DVDs = $41.75

Sales tax = $3.15

Coupon = $1.00 off

To find:

The cost of each DVD.

Solution:

Let x be the cost of each DVD.

Then, cost of two DVDs = 2x

Amount spent of 2 DVDs = Cost of 2 DVDs + Sales tax - Coupon discount

$41.75=2x+3.15-1.00$

$41.75=2x+2.15$

$41.75-2.15=2x$

$39.6=2x$

Divide both sides by 2.

$\dfrac{39.6}{2}=x$

$19.8=x$

Therefore, the cost of each DVD is $19.8.

8 0

3 years ago

4. Find the area of this figure.

mihalych1998 [28]

Answer:

I believe it is 100 ft

Step-by-step explanation:

3 0

3 years ago

What is the slope of the line

vfiekz [6]

Answer: 3

You can find slope by using the 'rise over run' method. Find 2 clear points and count the number of units between those points, across the x axis and up the y axis. You should have 3/1 (y/x) as your slope.

6 0

3 years ago

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Look at the picture for the question please show work.

lukranit [14]

$A=\dfrac{1}{2}ah\\
a=25 \text{ mm}\\
h=14 \text{ mm}\\\\
A=\dfrac{1}{2}\cdot25\cdot14\\
A=175 \text{ mm}^2 \Rightarrow C$

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3 years ago