So average is of the first 6 tests is 82 well that means

(test1 + test2+ test3+ test4 + test5+test6)/6 = 82

so now let do some cross multiplliying

test1 + test2 + test3 + test 4 + test5 +test6 = 82*6

test1 + test2 + test3 + test 4 + test5 +test6 = 492

now lets see if we can find that 7th test score

(test1 + test2 + test3 + test4 + test5 +test6 + test7)/7 = 80.5

So look we found test1 + test2 + test3 + test4 + test5 +test6 to be 492 so lets substitute.

(492 + test7 )/7 = 80.5

test7 = (80.5*7)-492 = 71.5

7 0

3 years ago

At the start of the experiment substance is measured to be 70°C, and by the end of the experiment its temperature is measured as

11Alexandr11 [23.1K]

9514 1404 393

Answer:

-130 °C

Step-by-step explanation:

The change is found by subtracting the start temperature from the finish temperature. It is ....

-60 °C - 70 °C = -130 °C

3 0

3 years ago

Write the expression 53.7124 x 10^{3} as a single number

mars1129 [50]

Answer:

53712.4

Explanation:

$\sf\rightarrow 53.7124\:x\:10^3$

10³ = 1000

$\sf\rightarrow 53.7124\:x\:1000$

$\sf\rightarrow 53712.4$

6 0

2 years ago

Read 2 more answers

Sometimes the unit price on two sizes of the same product will be the same. When this is the case, how will different kinds of d

nadezda [96]

<span>The "unit price" tells gives the cost per pound, quart, or other unit of a food package. If you compare the cost of the same unit of the same food you can save money. </span><span>
Different kinds of discounts will affect differently the total unit price of each size.</span>

4 0

3 years ago

Read 2 more answers