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anzhelika [568]
2 years ago
15

A school assembly had 90 students in attendance, and 80% of them were first-graders. How many first-graders were at the assembly

?
Mathematics
2 answers:
puteri [66]2 years ago
6 0

Answer:

72

Step-by-step explanation:

80/100=4/5

4/5 * 90 = 72

Sav [38]2 years ago
5 0

the answer is 72! Hope this helps! :)

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Can I have some help
Kaylis [27]
4*7=28
5y=28
divide 5 to 28
y=5.6
7 0
3 years ago
Javier walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a c
kap26 [50]

Hello, Bellaroyalball, your answer would be,

4 1/2 minutes before Jada arrived

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5 0
2 years ago
Is 12/42=10/35 a true proportion
olya-2409 [2.1K]
Yes, they both are 2/7

Proof: Left-hand side

Simplify the following:
12/42

The gcd of 12 and 42 is 6, so 12/42 = (6×2)/(6×7) = 6/6×2/7 = 2/7:
Answer:  2/7
Right-hand side:

Simplify the following:
10/35
The gcd of 10 and 35 is 5, so 10/35 = (5×2)/(5×7) = 5/5×2/7 = 2/7:
Answer:  2/7
3 0
3 years ago
The angle of elevation from the top of a house to a jet flying 2 miles above the house is x radians. If d represents the horizon
alisha [4.7K]

Answer:

d = 2cot(x) or d = 2/tan(x)

Step-by-step explanation:

The vertical distance from the jet to the top of the house represents the opposite side to the 'x' angle, while the horizontal distance, d, represents the adjacent side. Since we do not know the hypotenuse, the tangent and cotangent functions are the preferable choices:

tan (x) = \frac{2}{d}\\d = \frac{2}{tan (x) }\\cot (x) = \frac{d}{2} \\d= 2cot(x)

Therefore, the distance 'd' can be expressed as d = 2cot(x) or d = 2/tan(x).

6 0
3 years ago
I NEED HELP ASAP PLZZZZ
goldenfox [79]

Answer:

The first answer choise  

Step-by-step explanation:

x≤−3

7 0
3 years ago
Read 2 more answers
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