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Solnce55 [7]
2 years ago
7

4. Mrs. Johnson informed her studentsthat their exam will have at most 25questions.​

Mathematics
1 answer:
Ivan2 years ago
7 0

Answer:

The correct answer is 20 questions she took some off.

Step-by-step explanation:

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Of 80 t shirts 10% are white, 30% are blue and the rest are red how many are red ?
satela [25.4K]

10 % + 30 % = 40 %

100% - 40% = 60%

60% are red

Multiply total shirts by 60%

80 x 0.60 = 48

48 shirts are red

6 0
2 years ago
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What is the slope of the two points (-2,7) and (4,-8)
labwork [276]

Answer:

-15/6

Step-by-step explanation:

If you look at the first number in each point, the x coordinate, you see the 2nd point is 6 forward from the 1st point. Now the 2nd number is the y coordinate, and you can see it goes down 15 from the 1st coordinate. So y/x is the slope.

4 0
3 years ago
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Last year Billy weighed 75kg. This year he weighed 90kg. With what percentage did his weight increase. SHOW ALL WORK!!!
polet [3.4K]

well let's round. 90= 100, 75=80 that is how I face it. now 80 is 1/5 of 5/5= 100. so as a (%) we would sort it like:::: it is 80% out of +100 so he must have grown around 13%-16% due to him being 75kg in the past.

5 0
3 years ago
Bigger flags are used at the start of a race. How many
MAVERICK [17]

Answer:

49.45

Step-by-step explanation:

because if u take 10.10 +20.15+19.20 = 49.45

3 0
3 years ago
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The wavelength of red light in a spectrum is about 0.0000007 meters. Which
Nana76 [90]

Answer:

0.0000007

And if we count the number of zeros before the number 7, we can rewrite the number like this:

7x10^{-7}

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

Step-by-step explanation:

For this case we have the following number given:

0.0000007

And if we count the number of zeros before the number 7, we can rewrite the number like this:

7x10^{-7}

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

8 0
2 years ago
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