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Readme [11.4K]
3 years ago
14

Write and solve an equation to find the variable.

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
8 0

Answer:

see explanation

Step-by-step explanation:

The mean of a set of data is calculated using

mean = \frac{totalscore}{count}, that is

\frac{5.2+8.3+8.5+7.7+7.8+y}{6} = 7.1

37.5 + y = 7.1 ( multiply both sides by 6 )

37.5 + y = 42.6 ( subtract 37.5 from both sides )

y = 5.1

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Can someone help me plzz !
BlackZzzverrR [31]
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Mike earns $6.50 per hour plus 4% of his sales enter an equation for mikes total earnings, e, when he works x hours and has a to
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First identify what each variable means. since X is the amount of hours he works, and he makes $6.50 an hour, you know you need to multiply those two numbers together creating the 6.50x. You also know Y is his total sales, and he earns 4% of Y. To find 4% of Y you need to turn the percent into a decimal, and to do this you move the decimal two spaces to the left. Since 4 is a whole number, the decimal is after the 4 so you get .04 as your decimal. Then youd multiply .04 by Y getting .04y. Lastly you add 6.50x + .04y to get E, mikes total earnings. So your final equation is

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3 0
3 years ago
Read 2 more answers
The quadratic function f left parenthesis x right parenthesis equals 740.1 x squared minus 3109.2 x plus 945 approximates the gr
Artist 52 [7]

Answer:

(a) 85,602,300

(b) 352,621,800

Step-by-step explanation:

f(x) = 740.1x^2 - 3109.2x+945

(a) In 1998, <em>x</em> = 1998 - 1985 = 13

f(13) = 740.1(13)^2 - 3109.2(13)+945 = 85602.3

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(b) In 2009, <em>x</em> = 2009 - 1985 = 24

f(24) = 740.1(24)^2 - 3109.2(24)+945 = 352621.8

The expected number of subscribers in 2009 = 352621.8 × 1000 = 352,621,800

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3 years ago
a turtle covered a distance of 15 cm in 3 minutes, write it as a unit rate.what was its speed in m/hr?
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Answer:

3 minutes is (1 / 20) of an hour.  So the turtle can travel

20 * 15 cm in an hour.  = 300 cm / hour which equals 3 meters per hour


Step-by-step explanation:


6 0
3 years ago
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