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svet-max [94.6K]
3 years ago
15

Ms. Erickson is going to see the hot air balloons in Albuquerque, New Mexico.

Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
5 0
There will be 60 rainbow colored balloons.

150/5 = 30
2 times 30 = 60
2/5 = 0.4
60/150 = 0.4
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What number increased by 15% equal 161
kkurt [141]

Answer:

100%+15% = 115%

proportionally:

x - 100%

161 - 115%

x = (161 * 100%) / 115% = 140

4 0
4 years ago
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Help me please this is 7th grade math
kodGreya [7K]

Answer:

A = 113. 097

Step-by-step explanation:

A = πr^2

A = π6^2

A = π x 36

8 0
3 years ago
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Harry had $32. He spent all the money buying three notebooks for x dollars each and four packs of index cards for y dollars each
sergiy2304 [10]

Answer:

x = notebooks

y = indexboks

3x+4y=32 ( here is spent all money so I add 32 here )

5x+5y=50

by elemination method

3x+4y=32×5

5x+5y=50×4 ( here I'm going to eliminate y )

15 x+20y= 160

20x+20y= 200

- - = -

____________

-5x = -40

x = - 40 / -5

x = 8

here - × - = + so iam taking positive 8

now substitute the value of x in any equation

3×8+4y = 32

24 + 4y = 32

4y = 32-24

y = 8 / 4

y = 2

CHECKING

SUBSTITUTE BOTH VALUES IN ANY EQUATION

5×8+5×2 = 50

40 + 10 = 50

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I SUBSTITUTE IN 2ND EQUATION

3 0
3 years ago
1. a machine can scan 12 pages in 3/5 minutes. how many pages can be scanned in 1 minute
ozzi

Answer: 20 pages in a minute.

Step-by-step explanation:

12/3=4 pages in 12 seconds because 60/5=12 seconds

4*5=20 pages=60seconds=1 minute

3 0
3 years ago
Sphere and a cylinder have the same radius and height. The volume of the cylinder is 64 meters cubed.
Mrrafil [7]

Answer:

C. 128/3 meters cubed

Step-by-step explanation:

The volume of a cylinder is denoted by: V=\pi r^2h, where r is the radius and h is the height. We know it's equal to 64, so we can set that equal to V:

V=\pi r^2h

64=\pi r^2h

We know that the sphere and cylinder have the same height and radius. However, the "height" of a sphere is actually the same as its diameter, which is twice its radius. Then, we can replace h in the above equation with 2r:

64=\pi r^2h

64=\pi r^2*2r=2\pi r^3

\pi r^3=64/2=32

Now, the volume of a sphere is denoted by: V=\frac{4}{3} \pi r^3, where r is the radius. From above, we know that \pi r^3=32, so we can plug this into the equation:

V=\frac{4}{3} \pi r^3

V=\frac{4}{3} *32=128/3

Thus, the answer is C.

4 0
3 years ago
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