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3 years ago

The sum of and 7x2 is 10x2. Answers: 3x^2 or -3x^2

Mathematics

2 answers:

brilliants [131]3 years ago

7 0

Answer: The required answer is 3x².

Step-by-step explanation: We are given that the sum of an expression E and 7x² is 10x².

We are to find the value of the expression E.

According to the given information, we have

$E+7x^2=10x^2\\\\\Rightarrow E=10x^2-7x^2\\\\\Rightarrow E=(10-7)x^2\\\\\Rightarrow E=3x^2.$

Thus, the required answer is 3x².

Wittaler [7]3 years ago

4 0

$7x^2+10x^2=17x^2\\\\if\ not\ sume\ only\ difference\\\\7x^2-10x^2=-3x^2$

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Underline all the ordered pairs (x,y) that are solutions to the equation y=2x+1.

Romashka [77]

Answer:

(3,7) (7,3) (−1,14) (0,1) (12,25)

(5,11) (0,12) (1,8) (12,0) (−1,−1)

Step-by-step explanation:

We have the following function:

$y = 2x+1$ .

We are going to check if each ordered pair is a solution.

(3,7)

If when $x = 3, y = 7$ , it is a solution.

$y = 2x + 1 = 2(3) + 1 = 7$

This ordered pair is a solution.

(7,3)

If when $x = 7, y = 3$ , it is a solution.

$y = 2x + 1 = 2(7) + 1 = 15$

This ordered pair is not a solution.

(-1,14)

If when $x = -1, y = 14$ , it is a solution.

$y = 2x + 1 = 2(-1) + 1 = -1$

This ordered pair is not a solution.

(0,1)

If when $x = 0, y = 1$ , it is a solution.

$y = 2x + 1 = 2(0) + 1 = 1$

This ordered pair is a solution.

(12,25)

If when $x = 12, y = 25$ , it is a solution.

$y = 2x + 1 = 2(12) + 1 = 25$

This ordered pair is a solution.

(5,11)

If when $x = 5, y = 11$ , it is a solution.

$y = 2x + 1 = 2(5) + 1 = 11$

This ordered pair is a solution.

(0,12)

If when $x = 0, y = 12$ , it is a solution.

$y = 2x + 1 = 2(0) + 1 = 1$

This ordered pair is not a solution.

(1,8)

If when $x = 1, y = 8$ , it is a solution.

$y = 2x + 1 = 2(1) + 1 = 3$

This ordered pair is not a solution.

(12,0)

If when $x = 12, y = 0$ , it is a solution.

$y = 2x + 1 = 2(12) + 1 = 25$

This ordered pair is not a solution.

(-1,-1)

If when $x = -1, y = -1$ , it is a solution.

$y = 2x + 1 = 2(-1) + 1 = -1$

This ordered pair is a solution.

3 0

3 years ago

Multiple Choice: Please select the best answer.

PSYCHO15rus [73]

D. 171

-

Explanation:

4(2+5)^2 - 5^2

4 x 7^2 - 5^2

4 x 49 - 25

196 - 25

171

Answer: D. 171

7 0

3 years ago

Help?? This question is gonna be similar to a test question tommorow i do not understand

tigry1 [53]

You should calculate( the area of a circle of radius 15 cm ) minus the area of the circle of radius (15 cm - width of the frame). I am not able to read the number, sorry.
That is the surface area of the frame.

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(100xareaCircle(15cm-widthframe))/areaCircle15cm

8 0

3 years ago

A company made a bar graph showing the amount of sales for each month in thousands of dollars. Which of the following is closest

xxTIMURxx [149]

I believe it’s A I may be wrong tho

8 0

3 years ago

a group of five people go out to eat and buy appetizers and main dishes they decide to split the bill so each person pays 20% of

alexandr1967 [171]

5 people x $5 appetizers = $25
5 people x $10 main dish = $50
Total cost for the group of 5 = $75

$75 - 20% (.2) = $15 each person has to pay

Check ur work
$15 x 5 = $75

3 0

3 years ago