(-5q^2 + 6q + 7) - (-q^2 + 4q)

Mathematics

2 answers:

Katen [24]2 years ago

7 0

Answer:

-4q^2+2q+7

Remove unecessary parenthesis

-5q^2+6q+7-(-q^2+4q)

when there is a - in front of an expression in parenthesis, change the sign of each term in the expression

-5q^2+6q+7+q^2-4q

collect like terms -5q^2 and q^2

-4q^2+6q+7-4q

-4q^2+2q+7

beks73 [17]2 years ago

5 0

Steps to solve:

(-5q^2 + 6q + 7) - (-q^2 + 4q)

~Distribute the left side

-5q^2 + 6q + 7 + q^2 - 4q

~Combine like terms

-4q^2 + 2q + 7

Best of Luck!

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Jorge, sandra, danny, and valeria each mowed lawns after school and on the

Ronch [10]

Jorge mowed 18 lawns.

Let the number of lawns mowed by Jorge =x

So according to the question

Number of lawns mowed by sandra = x/3

Number of lawns mowed by Danny =x/2

Number of lawns mowed by Valeria =16

sum of total lawns mowed = lawns mowed by Jorge + lawns mowed by sandra + lawns mowed by Danny + lawns mowed by Valeria.

$x+\frac{x}{3} +\frac{x}{2} +16=49$

taking LCM as 6 and solving further we get

$\frac{6x+2x+3x+96}{6} =49$

By cross Multiplying we get

11x+96=294

11x=198

Solving further for x,

x=198/11

x=18

Therefore, the number of lawns mowed by Jorge is 18 .

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8 0

11 months ago

AREA ADDITION AND SUBTRACTION URGENT?

lora16 [44]

Since you already have the radius (7.53), you must find the area of the circle and subtract the area of the square from that. So, you use the formula A = $\pi$ r^2 where r is 7.53. From there, you get about 178.1311 square cm. Then, knowing the diagonal (7.53 * 2 or 14.06), you get the side length to be about 10.65. Squaring that, we get 113.4225. Subtracting, we get the answer to be about 64.7 square centimeters.