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Dmitriy789 [7]
3 years ago
14

Rob is asked to simplify the expression below.

Mathematics
1 answer:
nadya68 [22]3 years ago
8 0
He forgot to change ALL the sign inside the bracket.
It should read:
10x-8x-12y+3y=2x-9y
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Work out the unknown angles. Give reasons for each answer.
zalisa [80]
A)

Because the sum of angles in a triangle must equal 180° we can say:

62+α+90=180

α+152=180

α=28°

b)

Since all sides have equal length, all angles must have equal measure.  (This is an equilateral triangle).  And again, because the sum of the angle must be 180° we can say:

b+b+b=180

3b=180

b=60°
8 0
3 years ago
Please help ASAP! BRAINLIEST TO BEST/RIGHT ANSWER
damaskus [11]
1.8 x 10^13

Hope this helps.
5 0
3 years ago
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Use the data from problem 1 to complete this problem. Compare the range of the prices of Felix's books and of Tyler's books. Wha
Alborosie

Hello, I am The HumanSpider your answer is ready.

Answer:

Felix books are less expensive.

Tyler's books vary in price more.

Step-by-step explanation:

Screw that!

Note: My answer came from Yahoo answer also there are some good reviews from that answer.

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3 0
3 years ago
When completing the square, what value must you add to both sides of the equation to create a perfect square trinomial?
Sergeu [11.5K]
Notice that half of the coefficient of x is (1/2)(-4), or -2.

Then x^2 - 4x   becomes
         x^2 - 4x + 4 - 4 = 0, or (x -2)^2 = 4.   Then x = -2 plus or minus 2, and the two roots are 0 and -4.

Thus, add 4 to both sides to obtain x^2 - 4x + 4 = 4.
6 0
3 years ago
Jill weighs 120 pounds and is gaining ten pounds each month. Paris weighs 150 pounds and is gaining 4 pounds each month. How man
lyudmila [28]

Answer:

5 months

Step-by-step explanation:

To solve this problem, we need to create and algebraic equation for when Jill's weight will be equal to Paris's. If we take their current weight and then add the additional weight gain per month times the number of months, we can calculate the amount of time it will take for their weight to be equal by solving for m.

120+10m=150+4m\\10m-4m=150-120\\6m=30\\m=5

8 0
3 years ago
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