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3 years ago

Simplify: -7x6 + 5x6

Mathematics

2 answers:

Ira Lisetskai [31]3 years ago

8 0

Answer:

-2x6^

Step-by-step explanation:

i think

Phantasy [73]3 years ago

4 0

Answer:

-2x12

Step-by-step explanation:

I don't know if this will help but at least I tried

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You get a haircut that costs $23. You want to tip the barber 10%. How much tip will you leave him?

charle [14.2K]

Answer:

$2.30

Step-by-step explanation:

Multiply 23 by .10 to get 2.3

2.3 is 2 dollars and 30 cents

8 0

3 years ago

Read 2 more answers

I need help!!! ill give brain-list!!!

In-s [12.5K]

Answer:

8 hours worked, 64 dollars

56 dollars, 7 hours worked

themepark:

5 hours worked, 45 dollars

6 hours worked, 54 dollars

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5 0

3 years ago

Which of the following expressions is a factor of the polynomial x 2 +3/2x-1

Elodia [21]

Answer:

$\large \boxed{\sf \ \ \ (x+2)(x-\dfrac{1}{2}) \ \ \ }$

Step-by-step explanation:

Hello,

let's solve

$x^2+\dfrac{3}{2}x-1=0\\\\ 2x^2+3x-2=0 \ \text{multiply by 2}\\\\\\$

$\Delta=b^2-4ac=9+4*2*2=9+16=25$

There are two solutions

$x_1=\dfrac{-3-\sqrt{25}}{4}\\\\x_1=\dfrac{-3-5}{4}\\\\x_1=\dfrac{-8}{4}\\\\\boxed{x_1=-2}$

And

$x_2=\dfrac{-3+\sqrt{25}}{4}\\\\x_2=\dfrac{-3+5}{4}\\\\x_2=\dfrac{2}{4}\\\\\boxed{x_2=\dfrac{1}{2}}$

So we can write

$x^2+\dfrac{3}{2}x-1\\\\=(x-x_1)(x-x_2)\\\\=(x+2)(x-\dfrac{1}{2})$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0

3 years ago

Which sum is close to 1 0.4+1/2 ,7/8+1/4,4/5+2/3 explain

serg [7]

Presuming the question is "Which sum is closest to 1".
First, you need to either convert all the fractions to decimals or all the decimals to fractions, then add each pair.
0.4 + 1/2 = 0.9
7/8 + 1/4 = 1.125
4/5 + 2/3 = 1.466666...
The first one is different from 1 by 0.1. The second is different by 0.125. The third is different by 0.46666.... Therefore, the closest sum is the first, or 0.4 + 1/2

0.4 + 1/2

3 0

3 years ago

Cody has 7/8 pound of cheese. he uses 1/7 since there are 16 ounces in a pound how much is left

bagirrra123 [75]

Step One
Find the fraction left.
Starting amount = 7/8 pound
Used amount = 1/7 of a pound.

The common denominator of these two fractions is 8 * 7 = 56

Amount left = amount started with - amount used
Amount left = 7/8 - 1/7
Amount left = $\frac{7 *7 }{8 * 7} - \frac{1 * 8}{7 * 8}$
Amount left = $\frac{49 }{56} - \frac{ 8}{56}$
Amount left = 41 / 56 pounds

Step Two
Convert the Answer to ounces.

Ounces = (41/56) * 16
Ounces = 11.71 ounces almost 11 3/4

8 0

3 years ago