Explain how an estimate helps you to place the decimal point when multiplying 3.7 x 5.1?

Answers

Answer 1

Answer: Since 3*5=15, then the answer to 3.7*5.1 should be close to that same value.

3.7*5.1=18.87

But if you were solving it by hand, and accidentally wrote the answer as 1.887 or 188.7. Estimating helps you know that you placed the decimal in the wrong area, Since the number isn't close to 15.

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Cesar bought 2 bottles of juice that each hold 2 quarts and another bottle that holds 1 1/2 gallons of juice how many quarts of juice did he buy

Answers

10 quarts, because 2 x 2 = 4 quarts, then 1 gallon = 4 quarts, 4 + 4 = 8, then half of 4 is 2, which 8 + 2 = 10.

There are 4 quarts in a gallon, so there are 6 quarts in 1 1/2 gallons, so you have a total of 8 quarts of juice.

Solve the following proportion. 15/21=5/x
A. 3
B. 105
C. 7
D. not given

Answers

If you would like to solve the following proportion 15 / 21 = 5 / x, you can do this as follows:

15 / 21 = 5 / x /*x
15 / 21 * x = 5 /*21
15 * x = 5 * 21 /15
x = 5 * 21 / 15
x = 7

The correct result would be C. 7.

15/21 = 5/x
15 * x = 21 * 5
15x = 105
x = 7

The square abcd has side length 10cm. E is the midpoint of BC. Work out the length of DE. Answer to 1 decimal place.

Answers

-- DEC is a right triangle.

-- DC is one side of the square = 10 cm
-- EC is half the side of the square = 5 cm
-- DE is the hypotenuse = square root of (5² + 10²) = √(125 cm²) .

-- Truncated to one decimal place, that's 11.1 cm.

-- Rounded to one decimal place, it's 11.2 cm.

Think of it as a triangle. E is the midpoint of BC, so EC is 5cm. Then CD is 10cm. Pythagoras it, so 5^2 + 10^2 = DE^2. Rt(125) = 11.2 to 1 decimal place. That's the answer

PLEASE HELP I GIVE THANKS

Answers

if im not mistaken your answer will be c

The answer is c because the dot is closed and it going to the left

You practice your basketball shots every day. On Friday you made 20 shots. On Saturday you made 16 shots. What is the percent decrease in shots you made?4%

16%

20%

80%

Answers

So,

All you have to do to find the percent decrease is to subtract your score on Saturday from your score on Friday and divide the result by your score on Friday. If you let "f" represent your score on Friday and let "s" represent your score on Saturday, you can re-write this mathematically:

$(f - s)/(f) = percent\ decrease$

Substitute.
$(20 - 16)/(20) = percent\ decrease$
$(4)/(20) \ or\ (1)/(5)\ or\ twenty\ percent = percent\ decrease$

The percent decrease in shots you made was 20%. That would be option C.

the percent decrease was 20% because 4 shots less were on sat.

put it into a fraction to find the percentage:

4/20

=20%

What is 14+56 times 99 /144

Answers

Well 14 + 56 = 70 and 70 x 99/144 = 48 1/8 so your answer is 48 1/8
Hope this helps:)

14 + 56 = 70

70 x 99/100 = 69.3

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