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2 years ago

(y^2 - 3y - 5) - ( -y^2-7y+4 ):

Mathematics

1 answer:

sergey [27]2 years ago

8 0

Answer:

$(y {}^{2} - 3y - 5) - ( - {y}^{2} - 7y + 4) \\ {y}^{2} - 3y - 5 + {y}^{2} + 7y - 4 \\ 2 {y}^{2} + 4y - 9$

A is the correct answer

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astraxan [27]

Answer:

uhh

Step-by-step explanation:

8 0

3 years ago

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The scale on a map shows that 200 miles is represen by 5 inches on a map. Which proportion can be used to find the distance on t

Mandarinka [93]

Answer:

1.25 inches

Step-by-step explanation:

200 miles/ 50 miles = 5 inch / x

x = (50 x 5) / 200 = 250 / 200 = 1.25

4 0

4 years ago

a car traveling at 30 m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is its acceleration?

creativ13 [48]

Just divide -30 m/s (the change in velocity) by 12 seconds (the time required for the car to come to a stop):

-30 m/s
----------- = - 2,5 m / (sec)^2 (answer)
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3 years ago

How are the following three expressions different from each other, if needed they are? Do not just state the value of each but e

Advocard [28]

Answer:

2 and 3 are same since in both the cases we need to square 2 only not the negative 1 in it

1 is not same to 2 and 3 since in 1 we need to square 2 and negative 1 in it also.

Step-by-step explanation:

We are given the three expressions different from each other

We are supposed to find what may be same or different.

1) $(-2)^2$

$\Rightarrow (-1)^2 \times (2)^2\\\Rightarrow -1 \times -1 \times 2 \times 2 \\\Rightarrow 4$

2) $-2^2$

$\Rightarrow -1 \times 2^2\\\Rightarrow -1 \times 2 \times 2 \\\Rightarrow -4$

3) $-(2)^2$

$\Rightarrow -1 \times (2)^2\\\Rightarrow -1 \times 2 \times 2 \\\Rightarrow -4$

Now 2 and 3 are same since in both the cases we need to square 2 only not the negative 1 in it

1 is not same to 2 and 3 since in 1 we need to square 2 and negative 1 in it also.

3 0

4 years ago

Solve the inequality and graph the solution.<br> 6d - 10 > 8

Nonamiya [84]

Answer:

d>3

Step-by-step explanation:

6d-10>8

add the 10 to both sides

6d>18

divide the 6 from both sides

d>3

6 0

4 years ago