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Anna71 [15]
3 years ago
8

There are 15 people at a block club meting. How many different committees of 2 people can be formed

Mathematics
1 answer:
Alenkinab [10]3 years ago
7 0
The answer is 30 because you have to multiply the two together 
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On, average the front door of a home is opened 28 times each day.The williams family opened the front door 17 times more than th
Ludmilka [50]

Answer:

1395 times.

Step-by-step explanation:

The Williams family open their door 28 + 17 = 45 times a day.

So in October they opened it 31 * 45 = 1395 times.

6 0
3 years ago
Sofia hits a softball straight up. the equation h= -16t^2 + 90t models the height h, in feet, of the ball after t seconds. How l
andrezito [222]
It is in the air 5.625 seconds.

Using the quadratic formula,

t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}
\\
\\=\frac{-90\pm \sqrt{90^2-4(-16)(0)}}{2(-16)}
\\
\\=\frac{-90\pm \sqrt{8100-0}}{-32}
\\
\\=\frac{-90\pm \sqrt{8100}}{-32}=\frac{-90\pm90}{-32}
\\
\\=\frac{-90+90}{-32}\text{ or }\frac{-90-90}{-32}=\frac{0}{32}\text{ or }\frac{-180}{-32}
\\
\\=0\text{ or }5.625

0 is when the ball is first launched, 5.625 is when it hits the ground again.
4 0
3 years ago
    What is the area of the moon?
nataly862011 [7]

The moon is roughly a sphere, with an average radius of 1,738 kilometers.

The area of a sphere is      4 pi R² .

Area of the moon  =  (4 pi) (1,738 km)² =

                                 (12.566) (3,020,644 km²)  =  3.796 x 10⁷ km²

3 0
3 years ago
Please solve this it’s due in 2 hours I’ll give brainliest ONLY ANSWER IF YOU KNOW
Vsevolod [243]

Answer:

All are positive, and point upwards. The angle that they increase along the horizontal axis is different.

Step-by-step explanation:

There are no negative signs that the x is multiplied in any of the equations, and the number they are multiplied by is different for each graph: one is 1, another is 2, and the last is 3.

6 0
3 years ago
The worker was paid a day rate of $50 plus $3 for each box he filled with the apples that he
SCORPION-xisa [38]

Answer:

A y=mx+b y=3x+50

because $3 is the rate and $50 is what you get started off with

6 0
3 years ago
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