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Stels [109]
3 years ago
8

A student’s standardised mark on a class test was z = –1.7. The mean mark for the class is 55 and the standard

Mathematics
1 answer:
Karolina [17]3 years ago
7 0
The answer is 58, standard deviation is basically telling you that the space between each point in your statistics is on average that amount so that can tell us to take the mean mark of 55 and add 2.85 = 57.85
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ites A & Bare 5 inches apart on a map. Cities & Dare 4 inches apart. If C&D are 900 miles apart how many miles apart
lisabon 2012 [21]

Answer:

<u>Cities A and B are 1,125 miles apart</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Distance between A and B in the map = 5 inches

Distance between C and D in the map = 4 inches

Actual distance between C and D = 900 miles

2. How many miles apart are cities A and B?

We will solve the question, using Direct Rule of Three, as follows:

Distance in the map      Actual distance

A - B      5 inches                    x

C - D      4 inches                900 miles

***************************************************

4x = 900 * 5

4x = 4,500

x = 4,500/4

x = 1,125 miles

<u>Cities A and B are 1,125 miles apart</u>

7 0
3 years ago
What is the solution to 4x+6 is less than or equal to 18?
Sunny_sXe [5.5K]

Hey there! :)

Answer:

x ≤ 3

Step-by-step explanation:

Given:

4x + 6 ≤ 18

Subtract 6 from both sides:

4x ≤ 12

Divide both sides by 4:

4x/4 ≤ 12/4

x ≤ 3

6 0
2 years ago
Read 2 more answers
Help me out 3 i need some help :(
Alenkinab [10]

Answer:

The first one

Step-by-step explanation:

Since only the first session is $10, it wouldn't be 10x.

The second session is $5, and it will never be $10 again, so $5 sessions are unlimited which would be 5x.

So the answer is y = 10 + 5x

(sorry if i didnt explain well)

8 0
3 years ago
Please help me I’ll mark brainliest:)
Archy [21]

Answer:

x = 4

Step-by-step explanation:

6 0
3 years ago
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Evaluate the expression for u = –8 and v = 2.<br><br> uv − u
sp2606 [1]

Answer:

- 8

Step-by-step explanation:

- 8 × 2 - (- 8)

- 8 × 2 + 8

- 16 + 8

- 8

4 0
2 years ago
Read 2 more answers
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