MATHEMATICS HIGH SCHOOL

What is the sum of (x^2+6x-5) + (2x^2+15)

Answers

Answer 1
Answer:

Answer:

3x^2 + 6x + 10

Step-by-step explanation:

Because we're adding it, it doesn't matter if we just take out the parenthesis.

X^2 + 2x^2 gives us 3x^2.

6x stays the same.

-5 + 15 gives us 10.

3x^2 + 6x + 10

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What is the solution for the inequality |-5x+2|<7

Answers

i'm just gonna try my best.
it will be -5x+2=7
let's ignore the less than sign, so it will be -5x=7-2
   ; -5x=5
   ; x=-1
If the question asks you to graph it, you will graph -1 less than 7 or -1∠7
i'm sorry that i cant find the less than sign
|-5x + 2| < 7
|-5x + 2| < ±7
|-5x + 2| < 7    or    |-5x + 2| < -7
  -5x + 2 < 7      or    -5x + 2 < -7
         - 2  - 2                    - 2   - 2
        -5x < 5       or         -5x < -9
         -5    -5                    -5    - 5
           x < -1        or        x < 1⁴/₅

Your Mum has saved £12,000 and has agreed to give you a share. Would you rather have 1 5 or 1 10

Answers

I would rather have 1 10

I guess it's 1/10 becuase you guys said it so.

What is a type of percent that compares the final amount and original amounts?

Answers

Percentage change helps compare the final and initial amounts.

Write 3.25 x 10^4 as a ordinary number

Answers

Answer:

32500

Step-by-step explanation:

3.25 * {10}^(4) = 3.25 * 10000 \n = 32500

Answer:

32500

Step-by-step explanation:

3.25 x 10 to the power of 4 = 3.25 x 10000 = 32500

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 140 lb and each box of books weighs 50 lb. The maximum capacity of the elevator is 830 lb. How many boxes of books can the delivery person bring up at one time?

Answers

We can model this with the following inequality

50x + 160 ≤ 1000 where x is the number of boxes....so, subtracting 160 from each side, we have

50x ≤ 840 divide both sides by 50

x ≤ 16.8 boxes ....but since he can't bring up partial boxes, round down to 16

How many square corners does a pentagon have

Answers

I assume that by square corners you mean 90 degree angles. if this is the case then there are 2 in a pentagon. Hope I helped :)
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