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Hitman42 [59]
2 years ago
8

Help I was absent when she taught this

Mathematics
2 answers:
lys-0071 [83]2 years ago
8 0

Step-by-step explanation:

how how how how mamamma howw

DedPeter [7]2 years ago
4 0

Answer:

b

Step-by-step explanation:

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A circle has an area of 3.14 cm^2 . What is its radius?
Anni [7]

Answer:

Cant be determined

Step-by-step explanation:

You would need the diameter to figure this out

6 0
3 years ago
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Which transformations take f(x)=3x+1 to g(x)=−3x-5 ?
lbvjy [14]
<span>reflection over the x-axis and a translation 4 units down Refelcting f(x) over the x axis gives -f(x)=-3x-1 Subtracting a constant from -f(x) moves the graph of -f(x) that many units down. -f(x)-4=-3x-5=g(x) This shows that g(x) is obtained by reflecting f(x) over the x-axis and then translating 4 units down.</span>
8 0
3 years ago
What is the volume of a rectangular prism with length 7 cm, height 8 cm, and width 15 cm? A. 840 cm3 B. 840 cm2 C. 840 cm
SVETLANKA909090 [29]
It would be A 
8*7*15=840

3 0
3 years ago
A service station charges $251 for
likoan [24]
4x=251
251-84=167
4x=167
X=41.75
One tire will cost $41.75
4 0
3 years ago
The three planes given meet at a point. The planes are 3x+y-2z = 11, 4x-2y+z = -5, x+5y-4z = 33. The intersection is at what poi
Mumz [18]

Answer:

(2, 7, 1)

Step-by-step explanation:

We have three equations, and using Gauss-Jordan Elimination, we can solve for x, y, and z

3x + y - 2z = 11

4x - 2y + z = -5

x + 5y - 4z = 33

We can start by taking out the z from all rows except one. To do this, we can work with the second row. I chose the second row because -5 is small and easy to add up with other numbers, and z has no coefficient in this row.

We can add 2 times the second row to the first row and 4 times the second row to the third row to get

11x - 3y = 1

4x - 2y + z = -5

17x -3y = 13

We then have the first and third rows having two variables. Since the y coefficients are the same, we can eliminate the y by adding the negative of the first row to the third row. Our result is then

11x - 3y = 1

4x - 2y + z = -5

6x = 12

From the third row, we can gather that x= 2. We can then plug that into the first row to get

22 -3y = 1

subtract 22 from both sides

-3y = -21

divide both sides by -3

y = 7

We can then plug our x and y values into the second row to get

4(2) - 2(7) + z = -5

8 - 14 + z = -5

-6 + z = -5

add 6 to both sides

z = 1

Our answer is thus (2, 7, 1)

7 0
2 years ago
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