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Anna [14]
3 years ago
6

I really need help please.

Mathematics
1 answer:
love history [14]3 years ago
6 0

Answer:

64

Step-by-step explanation:

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Carys calculates the total amount EEE, in dollars, that she earns for working hhh hours using the equation E=10hE=10hE, equals,
timurjin [86]

Answer:

  • $10 per hour
  • 0.1 hours

Step-by-step explanation:

To find Carys' earnings in one hour, fill in h=1 in the formula:

  E = 10·1 = 10

Carys earns 10 dollars per hour.

__

To find the number of hours required to earn 1 dollar, fill in E=1 in the formula:

  1 = 10h

  0.1 = h . . . . . divide by 10

It takes 0.1 hours for Carys to earn 1 dollar.

4 0
3 years ago
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Solve the system of equations. -4x+7y = 20 & y=3x+15
andreyandreev [35.5K]

Substitute y = 3x + 15 to the equation -4x + 7y = 20:

-4x + 7(3x + 15) = 20          <em>use distributive property</em>

-4x + (7)(3x) + (7)(15) = 20

-4x + 21x + 105 = 20     <em>subtract 105 from both sides</em>

17x = -85     <em>divide both sides by 17</em>

x = -5

Substitute the value of x to the equation y = 3x + 15:

y = 3(-5) + 15

y = -15 + 15

y = 0

<h3>Answer: x = -5 and y = 0</h3>
7 0
3 years ago
Round to 3 SF<br> 0.0692494
cupoosta [38]

rounding 0.0692494 to 3SF is 0.069

6 0
3 years ago
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Solve the equation, if possible.<br> 1. 2x + 2(4x - 2) + 3x = x + 3(x – 8) + 4x
MAXImum [283]

Answer:

x=-4

Step-by-step explanation:

Distribute and expand everything in brackets.

2x+2*4x+2*-2+3x=x+3*x+3*-8+4x

2x+8x-4+3x=x+3x-24+4x

Solve like terms

13x-4=8x-24

Place like terms on same side.

13x-8x=-24+4

Solve for x

5x=-20

x=-4

5 0
3 years ago
Multiply -1/7 x 5/3<br> Write your answer in simplest form.
frez [133]

Here is your answer

\huge\frac{ - 5}{21}

REASON:

Given,

\frac{ - 1}{7}  \times  \frac{5}{3}

The numerator of one fraction is multiplied to the numerator of other and same is in the case of denominator.

\frac{ - 1 \times 5}{7 \times 3}

=   \frac{ - 5}{21}

HOPE IT IS USEFUL

6 0
3 years ago
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