Andrew has saved 36 number of R5 coins, 90 number of R2 coins and 126 number of R1 coins.
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
The coins are in the ratio 2:5:7 respectively. If he has a R90 in R2 coins. If x represent the total coins, hence:
(5/14) * x = 90
x = 252
Number of R5 coins = (2/14) * 252 = 36
Number of R1 coins = (7/14) * 252 = 126
Andrew has saved 36 number of R5 coins, 90 number of R2 coins and 126 number of R1 coins,
find out more on equation at: brainly.com/question/2972832
Answer:
E(x) = 7.05
Step-by-step explanation:
We are given the following information in the question:
x: 1 2 4 8 16
p(x): 0.05 0.10 0.30 0.40 0.15
Formula:
Hence, the expectation of the given data is 7.05
Answer:
C
Step-by-step explanation:
A solution is where the line touches the x-axis, and the line touches 4 and 8, which means 4 and 8 are the two solutions.
<span>investment A has 500 (for April) + 600 (for May) + 400 (for June) with a total of 1500.
</span><span>investment B has 400 (for April) + 300 (for May) + 500 (for June) with a total of 1200
</span><span>Converting each amount to ratios gives investment A: 33%, 40%, and 27% respectively. Whereas investment B ratio is: 33%, 25%, and 42%. Hence, the largest month to month change is June.</span>
Answer:
Step-by-step explanation:
e = 300-10(30)
e = 300 - 300
e = 0
