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Volgvan
3 years ago
9

The table shows the battery life of four different mobile phones:

Mathematics
2 answers:
tekilochka [14]3 years ago
5 0
Answer: Phone C

Using quick mental math, we can do 8% of 10 to get 0.8, which is close to the value of 0.0845*10. Also fairly quick is moving the decimal point over 1 spot to the right and we go from 0.0845 to 0.845 and that rounds to 0.8 when rounding to one decimal place. Recall that 8.45% = (8.45/100) = 0.0845

If you want to compute out the four results with a calculator, then it would look like this:
0.0845*20 = 1.69
0.0845*25 = 2.1125
0.0845*10 = 0.845
0.0845*18 = 1.521
and this shows that no other result (but choice C) is close to 0.8

So that's why the answer is choice C
deff fn [24]3 years ago
4 0

Answer:

The answer is C

Step-by-step explanation:

I took the test and got this anwser right!!!!!

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3 years ago
Which expression can be used to find the slope of a line containing the points (-3,2) and (7,-1)
Ket [755]
The right expression is -1-2/7-(-3) which then gives you -3/10
4 0
3 years ago
Read 2 more answers
Solve the equation for x. –x + 10 – 8x + 2x = 17 A. 11 B. –11 C. 1 D. –1
Luden [163]

Answer:

D

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take whole numbers to same side

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6 0
3 years ago
Write the equations of a line through the point (-3,-8) with a slope of -3/5 in
kompoz [17]

y=mx+b is the standard function for any straight line

y and x are constants, so they never change in the final form

m is the slope, which is given

b is the y intercept, which is not given

we have to plug in the values to find the solution, so plug in the (x,y) coordinates for their respective places in the equation

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now that we have b, we can just put the slope back in for m and get the answer

y= -3/5x -9.8

4 0
2 years ago
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