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balu736 [363]
3 years ago
11

What is the simplified form of each expression?

Mathematics
2 answers:
olganol [36]3 years ago
8 0
1)\\\dfrac{1}{3}(21m+27)=\dfrac{21}{3}m+\dfrac{27}{3}=7m+9\\\\2)\\\dfrac{3}{4}(-28m+20)=-\dfrac{3\cdot28}{4}m+\dfrac{3\cdot20}{4}=-3\cdot7m+3\cdot5=-21m+15\\\\3)\\(4-c)(-1)=4(-1)-c(-1)=-4+c=c-4\\\\4)\\(2-9c)((-8)=2(-8)-9c(-8)=-16+72c=72c-16
agasfer [191]3 years ago
4 0
1) 7m+9
2)-21m+15
3)-4+c
4)-16+72c
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alexandrea and imani each think of a number. alexandras number is 8 more than Imanis number. the sum of two numbers is 50. what
juin [17]
Alexandera=a
imani=i

a is 8 more than i or
a=8+i

the sum of the 2 numbers is 50 or
a+i=50

a=8+i
so subsitute 8+i for a in a+i=50
8+i+i=50
8+2i=50
subtract 8 from both sides
2i=42
divide both sides by 2
i=21

subsiutte into a=8+i

a=8+21
a=29



a=29
i=21
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3 years ago
What is the image of the point (4,-2) after a rotation 270 degree clockwise about the origin?
vaieri [72.5K]
The equivalent 90° CCW rotation maps (x, y) to (-y, x).
(4, -2) becomes (2, 4) after rotation.
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3 years ago
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J. 20

Step-by-step explanation:

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2 years ago
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A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%
andre [41]

Answer:  a) 683   b) 1067

Step-by-step explanation:

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Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

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Hence, the required sample size would be 1067 .

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3 years ago
The output is eleven more than the input
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X is the input and y is the output, "more" indicates addition, so 11 more than the input equals x + 11. Answer: y = x + 11
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