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3 years ago

6

Help me please there’s a time limit

1 answer:

Wewaii [24]3 years ago

4 0

It is C because 15x9=135

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What are the solutions of the following system

noname [10]

Answer:

<h2>(-6, 312), (6, 312)</h2>

Step-by-step explanation:

$\left\{\begin{array}{ccc}10x^2-y=48\\2y=16x^2+48&\text{subtracy}\ 16x^2\ \text{from both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}10x^2-y=48\\-16x^2+2y=48&\text{divide both sides by 2}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}10x^2-y=48\\-8x^2+y=24\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad2x^2=72\qquad\text{divide both sides by 2}\\.\qquad x^2=36\to x=\pm\sqrt{36}\\.\qquad x=\pm6\\\\\text{Put the values of}\ x\ \text{to the second equation}$

$2y=16(\pm6)^2+48\\\\2y=16(36)+48\\2y=576+48\\2y=624\qquad\text{divide both sides by 2}\\y=312$

6 0

3 years ago

Read 2 more answers

Twice the number v + 1<br><br>Answer:

Mrac [35]

Answer:

2(c+1)

=

2c+2

Step-by-step explanation:

6 0

3 years ago

Find the volume of a prism with a base of 153 square feet and a height of 7 feet.

kakasveta [241]

Answer: 1,071

Step-by-step explanation:

7 0

2 years ago

The range of which function is (2,infinity)

zysi [14]

Answer: D

Step-by-step explanation: just took the test and got it right

6 0

3 years ago

The function y = x 2 – 4x + 8 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence

Alla [95]

Answer:

Exterme Value: $(2,4)$ .

The bird reaches its minimum height which is 4ft affter covering a horizontal distance of 2 ft.

Step-by-step explanation:

The given function is $y=x^2-4x+8$ .

We add and subtract the square of half the coefficient of x.

$y=x^2-4x+(-2)^2-(-2)^2+8$ .

The first three terms form a perfect quadratic trinomial.

$y=(x-2)^2+4$ .

This function is now written in the form $y=a(x-h)^2+k$ , where (h,k) is the extreme value(vertex).

The extreme value or the vertex is $(2,4)$ .

Interpretation:

The bird reaches its minimum height which is 4ft affter covering a horizontal distance of 2 ft.

3 0

3 years ago