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Ratling [72]
3 years ago
5

80% of what number is 15?

Mathematics
1 answer:
Kazeer [188]3 years ago
3 0
15 = 80% * x

15 = 80/100 * x

15 = 8/10 * x

x = 15 * 10/8

x = 150/8

x = 18.75


<span>80% of 18.75 is </span>15<span>.</span>
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Please help me!!!!!!!!
Marina CMI [18]
I honestly don't know because i'm only in sixth grade but I think that it might be 30*.
5 0
2 years ago
A teacher wants to investigate whether listening to music while taking a math test increases scores. He instructs half
uysha [10]
<h2>D. This is an experiment with blocking </h2><h2 />

For your question: "A teacher wants to investigate whether listening to music while taking a math test increases scores. He instructs half

of his 36 students to listen to music while taking a test and the other half to not listen to music during the test. To

determine who listens and who does not, the teacher identifies the two students who scored highest on the last test

and randomly instructs one to listen to music and one to not. The teacher does the same for the next two highest-

scoring students and continues in this manner until each student has their instructions. Which of the following best

describes this plan?"

The answer is D

4 0
3 years ago
WE GIVE 11 POINTS AND BRAINIEST URGENT HELP
Alina [70]

Answer:

1.  Find < ACB

2. Use that triangles =180 to find <B  = 41

Step-by-step explanation:

1.We need to find < ACB

<ACB +<DBC= 180 They make a straight line

Subtract DBC from each side

<ACB = 180 - <DBC  

We know DCB = 113

ACB = 180 -113

ACB = 67

2.The three angles of a triangle = 180, so we can then find <B

<A +<B + <ACB = 180

72 + B + 67 = 180

Combine like terms

139+ <B = 180

Subtract 139 from each side

<B = 180-139

<B =41

3 0
3 years ago
Read 2 more answers
3/4 times 2 equals what
Tamiku [17]
(3/4)*2=(3*2)/4=6/4=3/2
4 0
3 years ago
Read 2 more answers
1. Which of the following coordinates for p will make line mn perpendicular to line op in the diagram below?
TiliK225 [7]
1. (3,2)....because when finding the slope, we find the the slope of mn and the slope of op are negative reciprocals.

2. y = 5x - 7.....slope here is 5....perpendicular line has a negative reciprocal slope...so the slope has to be -1/5

y= mx + b
slope(m) = -1/5
(-10,3)...x = -10 and y = 3
now we sub and find b, the y int
3 = -1/5(-10) + b
3 = 2 + b
3 - 2= b
1 = b
so ur perpendicular equation is : y = -1/5x + 1
5 0
3 years ago
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