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Nimfa-mama [501]
3 years ago
8

18% of what number is 7.2?

Mathematics
2 answers:
RUDIKE [14]3 years ago
5 0
18% of 40 is 7.2

Change the percentage (18%) into a decimal by dividing it over 100:

18/100 = 0.18

Divide 7.2 by the decimal (0.18):

7.2 / 0.18 = 40
notka56 [123]3 years ago
3 0
Use the Proportion is over of = %over 100 IS: 7.2 OF: Unknown (use variable) PERCENT: 18% 7.2 over X = 18% over 100 SOLVE THE ANSWER IS: 40
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What is the equation of the line that goes through (2, 2) and is perpendicular to y = 5x + 3?
Marina CMI [18]
Y = 5x + 3.....the slope here is 5. A perpendicular line will have a negative reciprocal slope. To find the negative reciprocal, we flip the original slope and change the sign. So we have slope 5 or 5/1.....flip it and it becomes 1/5....change the sign and it becomes - 1/5. So our perpendicular line will have a slope of -1/5.

y = mx + b
slope(m) = -1/5
(2,2)....x = 2 and y = 2
now we sub into the formula and find b, the y int
2 = -1/5(2) + b
2 = -2/5 + b
2 + 2/5 = b
10/5 + 2/5 = b
12/5 = b
so ur perpendicular equation is : y = -1/5x + 12/5 <==
5 0
3 years ago
Find the value of a and b
andriy [413]

Answer:

a = 133 degrees

b = 78 degrees

Step-by-step explanation:

the top and bottom lines are parallel.

the two sidelines are lines that intercept the top and bottom lines.

as they intercept parallel lines, they actually must have the same angles with them.

so, the 47 degrees inner angle at the bottom line, must be also somewhere at the interception point with the top line. and right, it must be now mirrored the outward angle at the top line. and that means a (the inward angle at the top line) is also the outward angle at the bottom line.

the sum of inward and outward angles at a point must always be 180 degrees.

so, the outward angle of 47 = the inward angle a =

= 180 - 47 = 133 degrees.

similar in the other side.

102 is the inward angle.

the outward angle of that is 180 - 102 = 78 degrees.

and that is also the inward angle b.

b = 78 degrees

4 0
2 years ago
A phone call starts at 9:14a.m. the call lasts for 24 minutes. what time does the call end?
madam [21]

Answer:

It would end at 9:38

Step-by-step explanation:

but obviously it is not one of the answer choices, so I would go with 9:42

3 0
3 years ago
Read 2 more answers
Write the expression as a single natural logarithm.<br> 2 ln m + 9 ln n=in?
Akimi4 [234]

Answer:

ln (m^2n^9)

Step-by-step explanation:

Rule: ln a + ln b = ln ab

Rule: ln a^n = n * ln a

2 ln m + 9 ln n =

= ln m^2 + ln n^9

= ln (m^2n^9)

= \ln m^2n^9

7 0
3 years ago
Evaluate. 7^3 <br> A) 21<br> B) 49<br> C) 81<br> D) 343
Mademuasel [1]
The answer is a 73/3=21
5 0
2 years ago
Read 2 more answers
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