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GuDViN [60]
3 years ago
6

There are 28 students in math class, 22 of the students passed a recent test. What percentage passed the test

Mathematics
1 answer:
Andrej [43]3 years ago
8 0
Percentage = (amount/total) x 100

amount that passed the test = 22
total amount of students = 28

percentage that passed the test
= (22/28) x 100
= 78.6 (to 3 sig.fig)
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Which equation represents y = −x2 + 6x + 7 in vertex form? y = −(x + 3)2 + 4 y = −(x − 3)2 + 10 y = −(x + 3)2 + 2 y = −(x − 3)2
Colt1911 [192]

\text{The vertex form:}\ y=a(x-h)^2+k\\\\f(x)=ax^2+bx+c\to h=\dfrac{-b}{2a},\ k=f(h)\\\\\text{We have}\ y=-x^2+6x+7\to f(x)=-x^2+6x+7\\\\a=-1,\ b=6,\ c=7\\\\h=\dfrac{-6}{2(-1)}=\dfrac{-6}{-2}=3\\\\k=f(3)=-3^2+6(3)+7=-9+18+7=16\\\\Answer:\ \boxed{y=-(x-3)^2+16}

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3 years ago
If AM = x + 8 and MB= 6x – 2, find MB.
IrinaK [193]

Answer:

10

Step-by-step explanation:

Firstly, AM=x+8

or, A=x+8-M......eqn (i)

MB=6x-2

or, B=6x-2-M......eqn (ii)

Now,

from eqn (i) and (ii)

x+8-M=6x-2-M

or, 8+2=6x-x-M+M

or, 10=5x

or, 10÷5=x

therefore, x=2

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MB=6x-2

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=12-2

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is it correct

please mark me as BRAINLIEST

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3 years ago
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Read 2 more answers
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