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Gekata [30.6K]
3 years ago
5

I need help on 11 plz I need a slot of help

Mathematics
1 answer:
Galina-37 [17]3 years ago
8 0

mean = (sum of values) / (number of values)

we know mean is 13 and we are given 8 values. The ninth value is the missing x:

13 = ((sum of 8 values) + x)/9

13 = (12+10+15+12+13+15+11+15+x)/9

13*9 = 103+x

x = 14

The missing value is 14. There are 14 pillows in the last box.

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because the angles in a rectangle are 90 degrees it is not a parallelogram true or false? please explain why
ra1l [238]
<span>A parallelogram is a 4-sided shape where opposites sides are parallel. A rectangle is a special case of a parallelogram. All rectangles are parallelograms.

But a rectangle is a shape where opposites sides are parallel *and* all the corners are 90 degree angles. So you can't say that all parallelograms would be rectangles. Some parallelograms would be rectangles, but not all.

Rectangles are a subset of the shapes called parallelograms. But parallelograms are *not* a subset of the shapes called rectangles.

It's similar to saying all cars are vehicles. But you can't say that all vehicles are cars. </span>
6 0
3 years ago
Suppose we went to choose 2 letters without replacement from 3 letters a b and c
vagabundo [1.1K]

Answer:

6 ways -  ab,ac, ba,bc and ca,cb

Step-by-step explanation:

We are given 3 letters a,b,c.

We can choose the first letter in 1 out of 3 ways.

Once the first letter has been chosen without replacement, we have two letters remaining. Another letter can be chosen from the 2 remaining letters in  2 ways. So the total number of ways of choosing the two letters is 3*2 = 6.

Listing out the possible set of choices:

Options include: ab,ac, ba,bc and ca, cb

3 0
3 years ago
The radius of a circle r in centimeters can be found by solving r to the second power = 70. What is the radius of the circle r,
slavikrds [6]

Answer:

bhb jkabdjkea 7- 70 bhakbhkd

3 0
2 years ago
PLLLLLLZZZZ HELP!! MULTIPLE CHOICE!!
liubo4ka [24]
First, set 2x+7 equal to 3x-7 since they are the same angle due to the parallel lines.

2x+7=3x-7
x=14

Then, since 2x+7 and 12y+1 equals 180, put it together to find y:

(2x+7)+(12y+1)=180
(2(14)+7)+(12y+1)=180
12y+1=145
12y=144
y=12

So, x=14 and y=12. Your answer should be C!
5 0
3 years ago
Can someone help me with this question ?
Juli2301 [7.4K]

Answer:

it is median

Step-by-step explanation:

because it have number in alphabetic order

4 0
2 years ago
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