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a_sh-v [17]
3 years ago
5

How is it 17.66 Right answer gets brainlest

Mathematics
1 answer:
pickupchik [31]3 years ago
7 0
23^2+B^2=29^3
529+B^2=841
B^2 =312
17.66
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Andrea, Justin, and Virginia went to an office supply store. Andrea bought 6 pencils, 7 markers, and 8 erasers. Her total was $1
olga2289 [7]

Answer:

x=0.25\,,\,y=1.75\,,\,z=0.25

Step-by-step explanation:

Let x,y,z denotes number of pencils, markers, erasers respectively.

For Andrea:

6x+7y+8z=15.75\,\,\,(i)

For Justin:

6x+8y+5z=16.75\,\,\,(ii)

For Virginia:

5x+5y+7z=11.75\,\,\,(iii)

On subtracting equations (i) and (ii), we get

(6x+7y+8z)-(6x+8y+5z)=15.75-16.75\\-y+3z=-1\\y-3z=1\\y=1+3z

Put y=1+3z in equation (i)

6x+7(1+3z)+8z=15.75\\6x+29z=8.75\,\,\,(iv)

Put y=1+3z in equation (iii)

5x+5(1+3z)+7z=11.75\\5x+22z=6.75\,\,\,(v)

Multiply equation (iv) by 5 and equation (v) by 6 and then subtract both the equations.

5(6x+29z)-6(5x+22z)=5(8.75)-6(6.75)\\13z=3.25\\z=\frac{3.25}{13}=0.25

Put z=0.25 in equation y=1+3z

y=1+3(0.25)=1.75

Put y=1.75\,,\,z=0.25 in equation (i)

6x+7(1.75)+8(0.25)=15.75\\6x+12.25+2=15.75\\6x=1.5\\x=0.25

8 0
4 years ago
Either enter an exact answer in terms of \piπpi or use 3.14, point, 14 for \piπpi and enter your answer as a decimal.
OverLord2011 [107]

Answer:

49π sq. units

Step-by-step explanation:

Find the diagram attached

We can find the area of the given circle

Given

diameter of the circle d = 14

Area of the circle = πd²/4

Substitute the given diameter

Area of the circle = π(14)²/4

Area of the circle = 196π/4

Area of the circle = 49π sq. units

Hence the exact answer in terms of π is 49π sq. units

4 0
3 years ago
The graph of g(x) is obtained by reflecting the graph of f(x)=−3|x| over the x-axis. Which equation describes g(x)? A.g(x)=−|x+3
Katen [24]

Answer:

B. g(x) = 3|x|

Step-by-step explanation:

The function f(x) = -3|x| is reflected down the y-axis, and it is negative.

For the function to be reflected up the x-axis, it has to be positive.

6 0
3 years ago
What does 0 = 0 mean regarding the solution to the system?
monitta

Answer:

There are infinitely many solutions to the system because the equations represent the same line

4 0
2 years ago
PLEASE HELP ME WITH THESE I WILL MARK BRAINLIEST IF ITS RIGHT..
alex41 [277]

Answer:

1.b 2.d 3.b 4.c

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4 0
3 years ago
Read 2 more answers
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