The student would have to score 100% on their next test to brung their average up to 90. Here is why;
90+84+86=260
(260+?)/4=90
(260+100)/4=90
360/4=90
This is done to get the mean (or average) of a group of numbers by adding all the numbers and dividing by the amount of numbers you added together. Here it is divided by 4 because of the three tests he has taken and the test he will take.
You're going to want to find the area of the whole square, then subtract the area of each triangle from that.
Step-by-step explanation:
65% of 80= 80×0.65 = 52mins
5/8 of 80= 5/8×80 = 50 mins
<h2>
more mins = 52-50= <em><u>2</u></em><em><u> </u></em><em><u>m</u></em><em><u>o</u></em><em><u>r</u></em><em><u>e</u></em><em><u> </u></em><em><u>m</u></em><em><u>i</u></em><em><u>n</u></em></h2>
Answer:
a=±5
Step-by-step explanation:
25=5^2
Given that, x^2−10x+25=x^2−10x+5^2
Identity: a^2−2(ab)+b^2=(a-b)^2
Here, a=x and b=5
∴=(x−5)^2
Hope this helps
3 hours
subtract the initial fee from the payment
$ 480 - $300 = $180
divide $180 by $60 = 3 hours