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natulia [17]
3 years ago
15

What number does x stand for in this equation?

Mathematics
2 answers:
seropon [69]3 years ago
8 0

Answer:

c. -3

Step-by-step explanation:

- 7x + 6= 27 [subtract 6 from both sides]

-7x = 21 [divide by -7 to isolate x]

x = -3

anyanavicka [17]3 years ago
6 0

Answer:

The answer is C

Pay attention, here's why.

Step-by-step explanation:

Let's solve your equation.

−7x+6=27

Step 1: Subtract 6 from both sides.

−7x+6−6=27−6

−7x=21

Step 2: Divide both sides by -7.

−7x /−7 = 21/ −7

x=-3

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Could someone please explain to me how to solve this problem? Thanks! :)
BartSMP [9]

Answer:

First of all since they are dividing subtract the powers of the base from each other .

Make sure the bases are the same.

((6^7-6)(3^3-4))³

((6)(3^-1))³

(6³)(3^-3)

216 × 1/27

= 8

That's option d.

Hope this helps.

6 0
3 years ago
Eden has a part time job. She gets paid £7. 20 per hourthis week she worked for 18 1/2 hourswork out Eden's total pay for this w
Dafna1 [17]

Answer:

$133.20

Step-by-step explanation:

Since the amount of hours she worked isn't a whole number, we can first separate 18 and 1/2 and work the problem out one at a time.

1. Multiply 7.20 by 18 to get 129.60

2. Multiply 0.50 by 7.20 to get 3.60.

3. Add 129.60 and 3.60 together to get the answer, 133.20.

5 0
2 years ago
Explain the phrase conservation of energy and provide an example.
liubo4ka [24]

Answer:

Conservation of energy, principle of physics according to which the energy of interacting bodies or particles in a closed system remains constant. ... For example, when a pendulum swings upward, kinetic energy is converted to potential energy.

Step-by-step explanation:

3 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> Multiply.<br><br> (2 − 5i)(3 + i)
ANEK [815]

(2-5i)(3+i)

use foil method to expand it into standard form

6+2i-15i+5i^2

5i^2-13i+6

7 0
3 years ago
The sum of three numbers is 26. Twice the first minus the second is the third less 2. The third is the second minus 3 times the
Agata [3.3K]

Let a, b, c represent the three numbers. The problem statement gives rise to three equations:

  • a +b +c = 26
  • 2a -b = c -2
  • -3a +b = c

Adding the first two equations gives

... (a +b +c) +(2a -b) = (26) +(c -2)

... 3a +c = 24 +c . . . . . simplify

... 3a = 24 . . . . . . . . . . subtract c

... a = 8 . . . . . . . . . . . . divide by 3

Adding the second and third equations gives ...

... (2a -b) +(-3a +b) = (c -2) +(c)

... -a = 2c -2 . . . . simplify

... -6 = 2c . . . . . . add 2, substitute for a

... -3 = c . . . . . . . . divide by 2

Using the third equation we can find b.

... -3·8 +b = -3 . . . . substitute for a and c

... b = 21 . . . . . . . . .add 24

The numbers are 8, 21, -3.

_____

The method above is sort of "ad hoc", taking advantage of the numbers in this particular set of equations. You can use more formal methods of Gaussian elimination or Cramer's Rule to solve these by just following a procedure. Or, your graphing calculator can do it for you.

6 0
3 years ago
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