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Natali [406]
3 years ago
7

Christine took 3 tests and had an average of 76. She has one more test to take and she wants an average of 80. What is the lowes

t score she can get on the last test? 10pts
Mathematics
1 answer:
amm18123 years ago
6 0

Answer: She has to score a minimum of 92 marks to take her average to 80

Step-by-step explanation:

Let the equation be

Three months total = 76 x 3 = 228

(x + 228) / 4 = 80

x + 228 = 80 x 4

x = 320 - 228

x = 92

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Simplify the expression and find its value when a = 5 and b = -3 .
kenny6666 [7]

Answer:

\sf\longmapsto \: 38

Step by step explanation:

\sf\longmapsto \:  2a² + 2ab +3-ab

\sf\longmapsto \:  2a² + 3 + ab (2-1)

\sf\longmapsto \: 2a² + 3 + ab (1)

\sf\longmapsto \:  2a² + 3 + ab

\sf\longmapsto \:  2a² + ab + 3

  • Putting a = 5 b = - 3

\sf\longmapsto \: 2(5) {}^{2}  + (5) (-3) +3

\sf\longmapsto \:  2 (25) - 15 + 3

\sf\longmapsto \: 50 - 12

\sf\longmapsto \: 38

7 0
3 years ago
Read 2 more answers
A real estate agent works on 7% commission. What is her commission on a house that she sold for $210,600?
loris [4]
To find how much the real estate agent made, we must multiply the two. 
Note: It is crucial that you put 7% as a decimal. 

210600*0.07= 14742

Therefore, the real estate agent made $14,742

Hope this helps!
8 0
3 years ago
Three security cameras were mounted at the corners of a triangular parking lot. Camera 1 was 106 ft from camera 2, which was 133
Harrizon [31]
Correct Answer: 
Option C. Camera 2

The greatest angle is always opposite to the side measure greater in length. So first we find the greatest side.

The distance between cameras is:

Camera 1 and Camera 2 : 106 feet
Camera 2 and Camera 3 : 133 feet
Camera 1 and Camera 3 : 151 feet

So the largest side of the triangle is the side between camera 1 and camera 3. So the camera opposite to this side will have to cover to greatest angle. The camera opposite to this side is Camera 2. This scenario is also shown in figure below.

Therefore, Camera 2 had to cover the greatest angle. 

5 0
3 years ago
I need help asap<br> i need to know how to show work pls help
Alona [7]

Step-by-step explanation:

add all the freqency up which is 100

you have to use a customize spinner and put in all the colors that are all on the side...

Spin 150 times ( 250-100= 150) and put tally marks on the sheet of tallys.

Then count all you red and see.

Hope all that makes sense..

7 0
3 years ago
Please help me with my math
Natasha_Volkova [10]

Answer:

The answer is C

Step-by-step explanation:

the y-intercept is going through 0 therefore there would be no "b" in the y=mx+b formula

3 0
3 years ago
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