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3 years ago

15

Please Help With This Question?!?

1 answer:

posledela3 years ago

6 0

Answer:

Step-by-step explanation:

negative

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Complete the square to the problem X^2+6x-16=0

marishachu [46]

Answer:

<h2>x = -8 or x = 2</h2>

Step-by-step explanation:

$(a+b)^2=a^2+2ab+b^2\qquad(*)\\\\-------------------------------\\\\x^2+6x-16=0\qquad\text{add 16 to both sides}\\\\x^2+6x=16\\\\x^2+2(x)(3)=16\qquad\text{add}\ 3^2\ \text{to both sides}\\\\\underbrace{x^2+2(x)(3)+3^2}_{(*)}=16+3^2\\\\(x+3)^2=16+9\\\\(x+3)^2=25\Rightarrow x+3=\pm\sqrt{25}\\\\x+3=-5\ \vee\ x+3=5\qquad\text{subtract 3 from both sides}\\\\\boxed{x=-8\ \vee\ x=2}$

3 0

3 years ago

What is the answer pls?

inna [77]

:) Hope this answers your question :)

6 0

3 years ago

Solve each system by substitution <br><br> 4y - 6 = 2x<br> y- 3x=9

ArbitrLikvidat [17]

X = -3, y = 0 i think

6 0

3 years ago

Read 2 more answers

a small bridge sit atop for cube shaped powers that all have the same volume. The combined volume of the four pillars is 503 how

Natasha_Volkova [10]

Answer:

60 inches long are the sides of the pillars.

Step-by-step explanation:

Given : A small bridge sits atop four cube shaped pillars that all have the same volume. the combined volume of the four pillars is 500 ft cubed.

To find : How many inches long are the sides of the pillars?

Solution :

Refer the attached picture below for Clarence of question.

The volume of the cube is $V=a^3$

Where, a is the side.

The combined volume of the four pillars is 500 ft cubed.

The volume of each cube is given by,

$V=\frac{500}{4}=125\ ft^3$

Substitute in the formula to get the side,

$125=a^3$

$a=\sqrt[3]{125}$

$a=5\ ft$

We know, 1 feet = 12 inches

So, 5 feet = $5\times 12=60$ inches

Therefore, 60 inches long are the sides of the pillars.

6 0

3 years ago

Which expression is equivalent to 73•7-5

Morgarella [4.7K]

order of operations

BEMDAS:

B - <em>Brackets</em>

E - <em>Exponents</em>

D - <em>Division</em>

M - <em>Multiplication</em>

A - <em>Addition</em>

S - <em>Subtraction</em>

73 • 7 - 5 = 511 - 5 = 506

3 0

3 years ago

Read 2 more answers