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saveliy_v [14]
3 years ago
9

In Mrs. Robinson's class, there are 16 girls and 14 boys. The mean of the girls' heights is 63.7 inches, and the mean of the boy

s' heights is 65.4 inches. What is the mean of the heights of all 30 students? Express your answer as a decimal to the near tenth.
Mathematics
1 answer:
Elodia [21]3 years ago
8 0

Answer: 64.6

Step-by-step explanation:

If you add up 63.7 and 65.4 and then divide by 2 you get 64.6.

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If x=9 and y=−3, evaluate the following expression:10−4xy​
ValentinkaMS [17]

Answer:

118

Step-by-step explanation:

10-4xy

10-4(9)(-3)

10-36(-3)

10+108

118

6 0
3 years ago
Write the equation (in point-slope form) for the line parallel to y = x + 4 and passes
Tanya [424]

Answer:

y = x-7

Step-by-step explanation:

<u>Step 1:  Write the equation in point-slope form</u>

Point Slope Form:  y-y_{1}=m\left(x-x_{1}\right)

<u>Plug in the numbers and solve</u>

<u />y - (-2) = 1(x - 5)

y + 2 = x - 5

y + 2 - 2 = x - 5 - 2

y = x-7

Answer:  y = x-7

8 0
2 years ago
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May someone please help me with this :)
CaHeK987 [17]
1. The perimeter = 3.7 + 3.7 + 2.8 + 2.8
= 13
The area = 3.7 * 2.8 = 10.36

2. Perimeter = 11.2
Area = half base times height
2.6 * 1.5 = 3.9 squared
6 0
3 years ago
Read 2 more answers
10 in<br> Given the figure. Find AC.
rjkz [21]

Answer:

if its an arc and center angle is given it could be double the size. IF it is a triangle measure you would use Pythagoras for triangle and trig for given angle, if two triangles are shown and they are scale of each other alternative measures given divide into each measure by the correct line and check this with the matching angles. when found as a division this is the ratio so then you just multiply to find the larger measure but divide to find the smaller measure. AC could also be a junction or vector, if its a type of vector then you just follow the arrows and count how many arrows fit the line pick a direction and ie) if its x2 a then you show a+a.

Step-by-step explanation:

5 0
3 years ago
PLEASE HELP ME ITS DUE IN LIKE 7 mins
Nookie1986 [14]

Answer:

919,797.64

Step-by-step explanation:

1 82100

2 84152.5

3 86256.3125

4 88412.72031

5 90623.03832

6 92888.61428

7 95210.82964

8 97591.10038

9 100030.8779

10 102531.6498

total = 919,797.64

3 0
3 years ago
Read 2 more answers
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