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ludmilkaskok [199]
3 years ago
14

Given ƒ(x) = 8x + 25, find x when ƒ(x) = 9. A) −2 B) −1 C) 0 D) 2

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
8 0
A)-2
9=8x+25
-16=8x
x=-2
aniked [119]3 years ago
5 0
A) -2

9=8x+25
-16=8x
-2=x
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it is the same

Step-by-step explanation:

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Ivahew [28]
I believe your answer is C
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Match each linear inequality with the letter for the graph below. (55 Brainly points)
Anna35 [415]

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4 0
3 years ago
If the mean heights of three groups of students consisting of 20,16 and 14 students are 167m, 150m and 1.40m respectively find t
Aleonysh [2.5K]

Answer:

1.54 m

Step-by-step explanation:

Given information:

<u>Three groups of students</u>

  • 20 students with a height of 1.67 m
  • 16 students with a height of 1.50 m
  • 14 students with a height of  1.40 m

⇒ Total number of students = 20 + 16 + 14 = 50

To find the <u>mean height</u> of all the students, <u>divide</u> the <u>sum of all the students' heights</u> by the <u>total number of students</u>:

\begin{aligned}\implies \sf mean\:height & =\dfrac{(20 \times 1.67)+(16 \times 1.50)+(14 \times 1.40)}{50}\\\\ & = \dfrac{33.4+24+19.6}{50}\\\\ & = \dfrac{77}{50}\\\\ & = 1.54\:\: \sf m\end{aligned}

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6 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP!!(SHOW ALL STEPS)<br><br> Determine the factors<br> x2y + 3x2 + 3y + 9
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Answer:

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Step-by-step explanation:

x^2y + 3x^2 + 3y + 9

I will factor by grouping

Taking the first two terms I can factor out x^2

Taking the last two terms I can factor out 3

x^2y + 3x^2     + 3y + 9

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Now I can factor out (y+3)

(y+3) (x^2+3)

Since(x^2+3) and (y+3) cannot be factored , this is completely factored

8 0
3 years ago
Read 2 more answers
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