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Norma-Jean [14]
3 years ago
13

The product of a number and 4 increased by 7 is 5. What is the number?

Mathematics
1 answer:
yanalaym [24]3 years ago
6 0

Answer: x = -1/2 = -0.5

Step-by-step explanation:

set up an equation

4x + 7 = 5 subtract 7 from both sides

4x = - 2 divide both sides by 4

x = -2/4

x = -1/2 = -0.5

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4 0
3 years ago
Factor 8a^2+8ab+8ac+3a+3b+3c
nalin [4]

Answer:

(8a + 3)(a + b + c)

Step-by-step explanation:

8a^2 + 8ab + 8ac + 3a + 3b + 3c =

= 8a(a + b + c) + 3(a + b + c)

= (8a + 3)(a + b + c)

5 0
3 years ago
Fifteen 7th graders were asked how many hours they spend doing homework each week and how many hours they spend watching televis
timama [110]

Answer:

A.

  • 18 > 14, true

B.

  • 12 - 16 = -4, true

C.

<u>Mean:</u>

  • Homework = (4 + 6*2+10*3+12*2+14*4+16*2+18)/15 = 11.73
  • Television = (0 + 10*3+12*1+16*3+18*4+20*3)/15 = 14.8

<u>The difference:</u>

  • 14.8 - 11.73 > 1, NOT true

D.

  • True
3 0
3 years ago
Solve for m. (-11/6) + m = -2/9
3241004551 [841]

Answer:

m = \frac{29}{18}

Step-by-step explanation:

=> (-11/6) + m = -2/9

Adding 11/6 to both sides

=> m = -\frac{2}{9} + \frac{11}{6}

LCM = 18

=> m = \frac{-4+33}{18}

=> m = \frac{29}{18}

4 0
3 years ago
Read 2 more answers
Students were surveyed about their favorite colors 1/4 preferred red, 1/8 preferred blue, 3/5 preferred green. If 15 students pr
const2013 [10]

Answer:

Let us assume the total number of students surveyed = x

Then

Number of students preferring red = x/4

Number of students preferring blue = x/8

Then

Number of students remaining = x - [(x/4) + (x/8)]

                                                  =x - [(2x + x)/8)

                                                  = x - (3x/8)

                                                  = (8x - 3x)/8

                                                  = 5x/8

Number of students preferring the color green = (3/5) * (5x/8)

                                                                          = 3x/8

We also know that the total number of students preferring the color green is 15

So

3x/8 = 15

3x = 15 * 8

x = (15 * 8)/3

  = 5 * 8

  = 40

So in total 40 students were surveyed. I hope the procedure is clear to you.

Step-by-step explanation:

6 0
3 years ago
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