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marin [14]
3 years ago
9

If 5 + b = 3 and a - b = 7 , then which of the following is true?

Mathematics
2 answers:
brilliants [131]3 years ago
4 0

2a plus 6 equl eight i hink so

ira [324]3 years ago
4 0

Answer:

<u>Solve the given system first</u>

  • 5 + b = 3
  • a - b = 7

<u>Find b:</u>

  • b = 3 - 5 = -2

<u>Find a:</u>

  • a - (-2) = 7
  • a = 7 - 1
  • a = 5

<u>Verify the options for correctness:</u>

  • 2a + b = 2(5) + (-2) = 10 - 2 = 8, correct
  • 2a - 2b = 2(5) - 2(-2) = 10 + 4 = 14, incorrect
  • a - 2b = 5 - 2(-2) = 5 + 4 = 9, incorrect
  • 2(a - b) = 2(5 - (-2)) = 2(7) = 14, incorrect

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jenyasd209 [6]

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1 year ago
Which shows 38 1 , 000 written as a decimal? A. 0.38 B. 0.308 C. 0.038 D. 0.380
Softa [21]

Answer:

C. 0.038

Step-by-step explanation:

If you divide 38 by one thousand, you get 38 thousandths as a decimal which is 0.038.

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3 0
2 years ago
Read 2 more answers
1. when y=7 , what is the value of x?<br><br> 2. what is the y-intercept of the graph?
Yakvenalex [24]

1) Correct.

2) The y-intercept is when x=0, so it is (0,5).

7 0
1 year ago
if a rectangle has am area of 2x²+11x+15, what would be an expression for the length, and for the width?
lozanna [386]

Answer:

Length = 2x + 5

Width = x + 3

Step-by-step explanation:

Area of rectangle = length × width

Expression for area of the rectangle = 2x² + 11x + 15

Factorising the quadratic expression

2x² + 11x + 15 = 2x² + 6x + 5x + 15 = (2x² + 6x) + (5x + 15) = 2x(x + 3) +5(x + 3) = (2x + 5)(x + 3)

Length = 2x + 5

Width = x + 3

3 0
2 years ago
1. (05.06 MC)
adoni [48]
Part A: it is linear because it is not curving and it consists of straight lines.

Part B: in side A it is increasing because it has a positive slope. In side b it is constant because the slope is 0 since it is straight. Finally, side C is decreasing because the slope is negative.

Part C: during side A the ant is crawling out of the hole in 2 seconds. After that, the ant stops for 2 more seconds as shown in side B. Then, he crawls back into the hole as shown by the decrease in distance due to the slope.

Hope this helps!!!
8 0
3 years ago
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