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hammer [34]
1 year ago
11

If x= -2what is f(x)= -x²+5​

Mathematics
1 answer:
RoseWind [281]1 year ago
7 0

Answer:

1

Step-by-step explanation:

f(x)= -х² + 5

f(-2)= -2²+5

f(-2)= -4+5

f(-2)= 1

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Need help with two questions!!
eimsori [14]

Couple things to note:

  1. Slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.
  2. Slope can be calculated using any two points on a line and the formula y₁ - y₂ / x₁ - x₂.

For the first problem, we know the slope of Function A is 6 (refer to slope-intercept form above). To compare the slopes of Function A and Function B, first find the slope of Function B.

Use y₁ - y₂ / x₁ - x₂. Two points on the line are (0, 1) and (-1, -2). Plug these into the formula accordingly and solve for slope.

y₁ - y₂ / x₁ - x₂

1 - (-2) / 0 - (-1)

1 + 2 / 0 + 1

3 / 1

3

The slope of Function B is 3. This is half of 6 (the slope of Function A), so the correct answer to question 1 is the first option: Slope of Function B = 2 × Slope of Function A.

For the second problem, substitute m and b in y = mx + b according to the graph. b is the y-intercept (the point at which the line intersects the y-axis); it is (0, -4), or -4. This gives us

y = mx - 4

We must now find m. Follow the same steps above to find slope. Our two points are (-2, 0) and (0, -4).

y₁ - y₂ / x₁ - x₂

0 - (-4) / -2 - 0

0 + 4 / -2

4 / -2

-2

Substitute.

y = -2x - 4

The first option is the correct answer.

5 0
3 years ago
Read 2 more answers
Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
ELEN [110]

Answer:

Volume~of~cylinder=\pi r^2h

  • \pi *(10)^2*5
  • 500\pi
  • 1570.8~m^3

<u>-------------------------</u>

<u>hope it helps..</u>

<u>have a great day!!</u>

3 0
2 years ago
Read 2 more answers
Find 5 rational numbers between -3 and -4
allsm [11]

Answer:

-3.2, -3.4, -3.6, -3.8, -3.9

Step-by-step explanation:

<em>Hey there!</em>

<em />

Well rational numbers can be a decimal as long as it can be turned into a fraction, meaning 3.5 is a rational number.

So rational numbers between -3 and -4 are,

-3.2, -3.4, -3.6, -3.8, -3.9

<em>Hope this helps :)</em>

6 0
2 years ago
Read 2 more answers
2. -6 &lt; -3; Divide both sides by -3
elena-s [515]
The answers for one, two, and three are:
False
True
True
8 0
3 years ago
Miguel is painting a cabinet shaped like a rectangular prism. He is going to paint all of the exterior sides except the top and
Oksana_A [137]

Answer:

40ft

Step-by-step explanation:

Please kindly see the attached file for more explanation

8 0
3 years ago
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