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Tpy6a [65]
3 years ago
11

Mary has scored 99, 83, 74, and 69 on her previous four tests. What score does she need on her next test so that her average

Mathematics
1 answer:
Gemiola [76]3 years ago
5 0

Answer:

66

Step-by-step explanation:

mean = the sum of the value / the number of the value

when we calculate the some must be 385 so the sum of the given value gives 319 so to reach the average 77 she must score 66

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dangina [55]
Find the same number in the numbers you have and that is your answer
8 0
4 years ago
The design of a microchip has the scale 40:1. The length of the design is 18cm, find the actual length of the micro chip?​
zimovet [89]

Answer:

0.45 cm

Step-by-step explanation:

Actual length of the micro chip

=  \frac{1}{40}  \times 18 \\  \\  =0.45 \: cm

4 0
3 years ago
If you answer all ill give brainliest.
Nonamiya [84]

Answer:

1.  1 < 8

2. 7 > -17

3. n-6 (N could be 7)

4. -4 x 3= -12

5. -5/5= -1 since the sign means greater than or equal to, that could be right.)

6. 3>Z (1) - 1

5 0
3 years ago
if a lake has high alkalinity, what is closest to the probability that the lake also has a shallow depth?
never [62]

Answer:

0.22

Step-by-step explanation:

Probability distribution is the function which describes the likelihood of possible values assuming a random variable. The alkalinity of lake is determined by dividing the high shallow depthness by the total of lake alkalinity. The shallow depth is 209 and the total alkalinity of the lake is 966. By dividing the depthness with alkalinity we get 0.22.

209/966 = 0.219

approximately 0.22

8 0
3 years ago
Solve for x: (8x + 15) = 24
Hatshy [7]

Answer:

Step-by-step explanation:

8x + 15 = 24

8x = 9

x = \frac{9}{8}

7 0
3 years ago
Read 2 more answers
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