2 years ago

Which of the following is the correct factorization of the trinomial below?

Mathematics

1 answer:

kkurt [141]2 years ago

7 0

Answer:

(-7x + 9)(x+2)

Step-by-step explanation:

-7x^2 - 5x + 18

Product = -126

Sum = -5
Factors (-14, 9)

-7x^2 - 14x + 9x + 18

-7x(x + 2) +9(x + 2)

(-7x + 9)(x + 2)

You might be interested in

How does an estimate help you place the decimal point when multiplying 3.9 ✖️5.3

Step2247 [10]

Answer: 20.67
Hope it helps

3 0

3 years ago

Plot the point (0,6), (3,15.8) and (9.5,0) using the graphing tool, and find the function

gladu [14]

I know the Answer I dont know how to show you. do you?

3 0

4 years ago

Read 2 more answers

A rectangle has a length of 12 yards less than 3 times its width. If the area of the rectangle is 135 square yards, find the len

Aleonysh [2.5K]

Answer:

The length is 15 yards

Step-by-step explanation:

Given

Represent the width with W and length with L: So

$Area = 135yd^2$

$L=3W - 12$

Required

Determine the length of the rectangle:

Area is calculated as thus:

$Area = L * W$

Substitute 3W - 12 for L and 135 for Area

$135= (3W - 12) * W$

$135= 3W^2 - 12W$

Reorder:

$3W^2 - 12W - 135= 0$

Divide through by 3

$W^2 - 4W - 45 = 0$

Expand:

$W^2 - 9W + 5W - 45 = 0$

$W(W - 9) + 5(W - 9) = 0$

$(W + 5)(W-9) = 0$

$W + 5 = 0$ or $W - 9 = 0$

$W = -5$ or $W = 9$

But width can't be negative

So:

$W = 9$

Recall that: $L=3W - 12$

$L = 3 * 9 - 12$

$L = 15$

<em>Hence, the length 15 yards</em>

4 0

3 years ago

Plz help. I need number 6 and 7

Cerrena [4.2K]

80 possible 2 digit passwords
5040 possible 4 digit PIN's with no repeats

can't see 7 to answer pls tell

8 0

4 years ago

what is the approximate distance from one corner of the soccer field to the opposite corner 60 yards, 100 yards

aalyn [17]

Answer:

Using Pythagorean theorem:

Diagonal = sqrt( 60^2 + 100^2) = 116.62

Hope this helps!

7 0

3 years ago