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3 years ago

How much less than 3x^2−7x+9 is 2x^2+4x−8 ? Thanks!!

1 answer:

maks197457 [2]3 years ago

8 0

Simplify.
3x^2−7x+9 - 2x^2+4x−8

1. 3x^2-2x^2 = x
2. -7x + 4x = -3x
3. 9 - 8 = 1

Combine.
x -3x +1

Thus, 2x^2+4x−8 is x -3x +1 less than 3x^2−7x+9

You might be interested in

17/100 in simplest form

sveticcg [70]

17 is a prime number so the simplest form is 17/100

5 0

4 years ago

The area of a rectangle gets reduced by 9 square units if its length is reduced by 5 units and the breadth is increased by 3 uni

ale4655 [162]

length = 17 units, breadth = 9 units

Step-by-step explaination:-

Let the length and the breadth of the rectangle be x units and y units respectively.

Then the area of rectangle = xy square units

According to given conditions, we have

(x -5)(y + 3) = xy - 9 and (x + 3)(y + 2) = xy + 67

=> xy + 3x - 5y - 15 = xy - 9

and xy + 2x + 3x + 6 = xy + 67

=> 3x - 5y - 6 = 0......eqn(i)

and 2x + 3y - 61 = 0.....eqn(ii)

Multiplying equation (i) by 2 and equation (ii) by 3, we get...

6x - 10y - 12 = 0....eqn(iii) and,

6x + 9y - 183 = 0....eqn(iv)

Subtracting equation (iii) from equation (iv), we get...

19y - 171 = 0 => y = 9.

Substituting this value of y in equation (ii), we get

2x + 3 × 9 - 61. = 0 => 9x - 34 = 0 => x = 17.

Hence, the length of rectangle = 17 units and

breadth = 9 units.

<h3>Hope it helps you!!</h3>

5 0

2 years ago

Which of the following situations could be represented by the expression −14+(−7)? Select two that apply.

aliya0001 [1]

Answer:

Step-by-step explanation:

Owing someone meand you have to give them money and therefore is represented ad a negative number.

-14 + (-7) is the same as -14 - 7

6 0

3 years ago

a woman lifts a 300 newton child a distance of 1.5 meters in 0.75 seconds. What is her power output in lifting the child?

djverab [1.8K]

Power = Work done / time

Work done = Force * Distance
= 300 N * 1.5 m = 450 J

<span>Power = 450 / 0.75 = 600 Watts.</span>

7 0

3 years ago

Read 2 more answers

April worked 1 1/8 times longer on her math project than Carl, he worked 5 3/4, how many more hours did April work? Please show

wolverine [178]

Answer:

$\frac{23}{32}\ hours$

Step-by-step explanation:

step 1

Find out the number of hours worked by April on her math project

Multiply 1 1/8 by 5 3/4

$1\frac{1}{8} (5\frac{3}{4})$

Convert mixed number to an improper fraction

$1\frac{1}{8}=1+\frac{1}{8}=\frac{1*8+1}{8}=\frac{9}{8}$

$5\frac{3}{4}=5+\frac{3}{4}=\frac{5*4+3}{4}=\frac{23}{4}$

substitute

$\frac{9}{8} (\frac{23}{4})=\frac{207}{32}\ hours$

Convert to mixed number

$\frac{207}{32}=\frac{192}{32} +\frac{15}{32} =6\frac{15}{32}\ hours$

step 2

How many more hours did April work?

Subtract the hours worked by Carl from the hours worked by April

$\frac{207}{32}-\frac{23}{4}=\frac{207-8*23}{32}=\frac{23}{32}\ h$

5 0

3 years ago