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mezya [45]
3 years ago
9

1. –2v – 7 = –23 (1 point) 15 8 –8 –15 2. Start Fraction x over 4 End Fraction – 5 = –8 (1 point) –27 –12 –7 12

Mathematics
1 answer:
lara [203]3 years ago
4 0

Answer:

  1. v = 8
  2. x = -12

Step-by-step explanation:

1. I like to work with positive numbers, so the first thing I'd do is multiply the equation by -1.

  2v + 7 = 23

  2v = 16 . . . . . subtract 7

  v = 8 . . . . . . . divide by 2

<em>Check</em>

  -2(8) -7 = -23 . . . . true

___

2. (x/4) -5 = -8

  x/4 = -3 . . . . . . . add 5

  x = -12 . . . . . . . . multiply by 4

<em>Check</em>

  (-12/4) -5 = -8 . . . . true

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The sum of three consecutive odd numbers is 147. what is the smallest of the three numbers?
Andrew [12]
Let x be the smallest odd number.
x+(x+2)+(x+4)=147
3x+6=147
x=47
therefore the smallest odd no. is 47.
3 0
3 years ago
WILL GIVE BRAINIEST <br> NEED HELP ASAP<br> DUE IN 10 MINS
tensa zangetsu [6.8K]

Answer:

Scientist B

Step-by-step explanation:

1 kg = 2.2 lbs

1L = 2.11 pints

So let's convert Scientist B's data.

3.0lbs salt = 3.0/2.2 = 1.36kg

6 pints water = 6/2.11 = 2.84L water

Scientist A

1kg salt

3.0L water

We now figure out the concentration of salt in water.

Scientist A Scientist B

1kg/3.0L = .33kg/L 1.36kg/2.84L = .48kg/L

So scientist B had a more concentrated solution.

5 0
3 years ago
Read 2 more answers
According to a nutrition coach, a 100 kg person should eat
alexira [117]

Answer:

0.07%

Step-by-step explanation:

This equation is solving for what percentage of 100 kg is 0.07 kg.

1. Set up the equation

\frac{0.07}{100} = \frac{x}{100}

0.07 kg out of 100 kg is equal to x out of 100 because x represents the percentage and percentages are out of 100.

2. Solve by cross multiplying

100x = 7

3. Solve for x by dividing both sides by 100

x = 0.07

The answer is 0.07%

4 0
3 years ago
4x − 5y = 25<br> Make a table of values. ASAP
Lerok [7]

Answer:

  • Given Below.

explanation:

4x - 5y = 25

-5y = 25 - 4x

y = \frac{25-4x}{-5}

y  = \frac{4x- 25}{5}

put x values in the function in order to find y values.

                <u> ___x___                                     ___y___    </u>

                        0                           |                    -5

                         1                           |                  -4.2

                         2                          |                  -3.4

                         3                          |                  -2.6

                         4                          |                   -1.8

                         5                          |                     -1

                         6                          |                    -0.2

6 0
2 years ago
Mary spent half of her allowance going to the movies. She washed the family car and earned seven dollars. What is her weekly all
Nata [24]

Answer:If Mary spent half of her allowance the equation will begin with 1/2x or 0.5x where x is her allowance and 0.5 is half of her allowance spent. Mary also earned 7 dollars by washing the car so this will be added to her allowance spent.

The problem says that after Mary has spent half of her allowance at the movies she was left with 18 dollars so that means that the equation must be equal to 18.

The equation you want to set up is

0.5x+7=18

Where, 18-7=11

0.5x=11

11/.5 = x

x = $22

Thus, Mary has a weekly allowance of 22 dollars.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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