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1 year ago

Which statement about y = x2 + 3x - 18 is true?

Mathematics

1 answer:

Anestetic [448]1 year ago

4 0

Answer:

Step-by-step explanation:

first of all, the correct factorization is

y = (x - 3)(x + 6)

because when we do the multiplication

y = x² + 6x - 3x - 18 = x² + 3x - 18

and then, the factorization tends us also directly the zero points, because y is only 0, when one of the factors is 0.

so, either x-3 or x+6 has to be 0 to make the whole expression 0.

and that is only for x=3 or x=-6

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13. Describe and correct the error in finding the product.

Blizzard [7]

Answer:

Answer:

x=−1.27794

Step-by-step explanation:

x(x−5)2=x2−52

x3−10x2+25x=x2−52

Step 1: Subtract x^2-52 from both sides.

x3−10x2+25x−(x2−52)=x2−52−(x2−52)

x3−11x2+25x+52=0

Step 2: Use cubic formula.

x=−1.27794

Hope it helps +_+

4 0

2 years ago

A:24<br> B:12<br> C:35<br> D:117

lyudmila [28]

Answer:

Step-by-step explanation:

total 180

180-84=96

96/2/4=48/4=12

7 0

2 years ago

Read 2 more answers

A flat rectangular piece of aluminum has a perimeter of 64 inches. The length is 8 inches longer than the width. Find the width.

sattari [20]

513 is the width/64x8=

8 0

3 years ago

I would like to know what 0.5-0.125q=(q-1)/4 equals out to.

Scrat [10]

Answer:

q = 2

Step-by-step explanation:

0.5-0.125q=(q-1)/4

At first, we have to multiply both the sides by 4.

4 × (0.5 - 0.125q) = q - 1

or, 2 - 0.5q = q - 1

now, we change the side by taking constant into the right side and the number into the left side.

2 + 1 = q + 0.5q

or, 3 = q (1 + 0.5)

or, 3 = 1.5 q

or, 1.5 q = 3

or, $\frac{1.5q}{1.5}$ = (3 ÷ 1.5) [Dividing both the sides by 1.5]

or, q = 2

Therefore, q = 2

8 0

3 years ago

I need help need help with Geometry

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

X is 21

z is the same as 111

y is 48

4 0

2 years ago