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MaRussiya [10]
3 years ago
12

Evaluate 8x^2 + 2x + 5, when x =7

Mathematics
1 answer:
bixtya [17]3 years ago
3 0

Answer:

432

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Step-by-step explanation:

<u>Step 1: Define</u>

8x² + 5x + 5

x = 7

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                                                                                                8(7)² + 5(7) + 5
  2. Evaluate exponents:                                                                                         8(49) + 5(7) + 5
  3. Multiply:                                                                                                             392 + 35 + 5
  4. Add:                                                                                                                 427 + 5
  5. Add:                                                                                                                 432
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3 0
3 years ago
In ∆FGH , FH⎯⎯⎯⎯⎯⎯∥BC⎯⎯⎯⎯⎯ , GB=14.4 , BF=4.8 , and GH=21 . What is a good estimate for the measure of CH⎯⎯⎯⎯⎯⎯ ? Multiple choic
aleksandr82 [10.1K]

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Step-by-step explanation:

6 0
3 years ago
2/5 divided by 3/4<br> 9/4 divided by 3/4<br> -5/7 divided by 1/3<br> -5/3 divided by 1/6
stealth61 [152]

2/5 ÷ 3/4 = 8/15

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5 0
3 years ago
Can you help me answer this question
r-ruslan [8.4K]
Division of a fraction is the equivalent of multiplying by its reciprocal
ex.
\frac{\frac{A}{B} }{\frac{C}{D}}=\frac{A}{B} *\frac{D}{C}
i suggest you try to remember this concept

in terms of your question

\frac{\frac{4c-12}{4c+8}}{\frac{c-3}{c^2-4}}= \frac{4c-12}{4c+8} *\frac{c^2 -4}{c-3}

from this point, just multiple the numerators together and denominators together, then simplify if necessary

fyi- difference of squares
x^2-b^2 = (x-b)(x+b)
relating that to
c^2-4 = c^2 -2^2 = (c-2)(c+2)

also a side note, you might want to factor out the 4 first in the top fraction


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4 years ago
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Katena32 [7]

Answer:

2x=x+x doesn't belong

Step-by-step explanation:

7 0
3 years ago
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