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Ulleksa [173]
4 years ago
11

Michael paid a repairman dollars per hour for a 4-hour job plus $69 for parts. The total charge was $320. Which equation can be

used to determine how much the electrician charged per hour?

Mathematics
1 answer:
Stels [109]4 years ago
5 0

Answer:

The answer is d) 4d = 320 - 60 becasue d is the dollors he made per hour and the repairman worked for 4 hours so you multiply 4 times d and then you subtract 60 from the total to get your final answer. If you subtracted already then you would divide that answer by 4 then you would find out how much the repairman maid per hour.

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For his craft project, James bought 101010 pieces of ribbon that were each 2.1\text{ feet}2.1 feet2, point, 1, start text, space
Murljashka [212]

9514 1404 393

Answer:

  7

Step-by-step explanation:

The total length of ribbon is ...

  (10)(2.1 ft) = 21 ft

There are 3 feet in a yard, so the number of yards is ...

  (21 ft)×(1 yd)/(3 ft) = 7 yd

5 0
3 years ago
An employer with 500 employees gives out gives out 120 surveys but receives only 90 surveys completed by the employees. What are
leva [86]

Answer:

Population 120 given the survey, sample 90 who answered the survey.

Step-by-step explanation:

The entire amount of employees who even received the surveys at all was 120. Because the total number was 120, 120 is the population.

Only 90 out of 120 surveys were received, so 90 is the sample because it is part of 120.

Hope this helps :)

6 0
3 years ago
In this exercise, lines m and n are parallel. Find the measure of each numbered angle.
Damm [24]

<u>1 = 62°</u> ( Vertically Opposite Angles )

<u>10 = 62°</u> ( Corresponding Angles )

<u>9 = 10 = 62°</u> ( Vertically Opposite Angles )

<u>6 = 95°</u> ( Vertically Opposite Angles )

<u>7 = 180° - 95° = 85°</u> ( Linear Pair )

<u>8 = 7 = 85°</u> ( Vertically Opposite Angles )

<u>5 = 8 = 85°</u> ( Corresponding Angles )

<u>3 = 5 = 85°</u> ( Vertically Opposite Angles )

4 = 180° - ( 9 + 7 )

4 = 180° - ( 62° + 85° )

4 = 180° - 147°

<u>4 = 33°</u> ( Angle Sum Property )

<u>2 = 4 = 33°</u> ( Vertically Opposite Angles )

5 0
3 years ago
Can you please show me how you got the answer (50 points)
AlexFokin [52]

<em>Answer:</em>

<em />4x^{6}2y^{-2}<em />

<em>Step-by-step explanation:</em>

<em>We can use a property I like to call SEi-F. (Subtract Exponents in a Fraction)</em>

<em>But first, there is an exponent outside of the parentheses in both places. We can use the Power of Parentheses to simplify and then use the SEi-F.</em>

<em>We will start with the x in the numerator.</em>

<em>3*4 = 12</em>

<em>Now for the y in the numerator.</em>

<em>4*4 = 16</em>

<em>Our new numerator is </em>4(2x^{12}y^{16})<em />

<em>We do need to simplify the numerator one more time to get rid of the 4 outside the parentheses.</em>

<em>We will start with x's coefficient.</em>

<em>2*4 = 8</em>

<em>Now for y's coefficient.</em>

<em>1**4 = 4</em>

<em>*y seems to have no coefficient, but if so, it has a coefficient of 1. This applies to other variables.</em>

<em>Our final simplified numerator is </em>8x^{12}4y^{16}<em>.</em>

<em>Repeat with the denominator.</em>

<em>Try it yourself!</em>

<em>Make sure that when you finish, you finish the fraction.</em>

<em>After completing the denominator, your completed fraction should be:</em>

<em />\frac{8x^{12}4y^{16}}{4x^{6}2y^{18}}<em />

<em>Now we can use the SEi-F to complete the problem.</em>

<em>Start with x.</em>

<em>8x - 4x = 4x</em>

<em>12 - 6 = 6</em>

<em>The first term is </em>4x^{6}<em>.</em>

<em>Now for y.</em>

<em>4y - 2y = 2y</em>

<em>16 - 18 = -2</em>

<em>The second term is </em>2y^{-2}<em />

<em>The complete, simplified equation is </em>4x^{6}2y^{-2}<em>.</em>

<em>I could be wrong on the answer, but the work should be correct.</em>

<em>Hope this helps. Have a nice day. Oh, and one more thing. Surprised I'm not stealing points?</em>

7 0
3 years ago
The heart rate of 10 football players is sampled. The rates measured in beats per minute are 62,74,74,64,76,6480,76,68,76
vovikov84 [41]

Answer:

The best estimate of the population mean for heart rate among football players is of 71.4 beats per minute.

Step-by-step explanation:

The best estimate for the population mean is the sample mean.

Sample mean:

Sum of all values in the sample divided by 10(size of the sample). So

\overline{x} = \frac{62+74+74+64+76+64+80+76+68+76}{10} = 71.4

The best estimate of the population mean for heart rate among football players is of 71.4 beats per minute.

3 0
3 years ago
Read 2 more answers
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