Algebra Functions and Data Analysis
1 answer:
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a) Simple interest earned by customer in 10 years is $ 675
b) Account balance after 10 years is $ 5175
<em><u>Solution:</u></em>
<em><u>The simple interest is given by formula:</u></em>
Where,
"p" is the principal
"r" is the rate of interest
"n" is the number of years
<em><u>a. How much interest will the customer earn in 10 years?</u></em>
From given,
Principal = p = $ 4500
Simple interest rate = r =1.5 %
n = 10
Substituting the values in formula,
Thus simple interest earned by customer in 10 years is $ 675
<em><u>b. What will the account balance be after 10 years ?</u></em>
Account balance = principal + simple interest
Account balance = 4500 + 675 = 5175
Thus account balance after 10 years is $ 5175
Solution: We are given that:
5 people can paint 7 walls in 21 minutes
Therefore, 1 person can paint 7 walls in minutes
Which means 1 person can paint 1 wall in minutes
Now, 3 people can paint 1 wall in minutes
Therefore, 3 people can paint 5 walls in minutes
Answer:
C and B
Step-by-step explanation:
(6)
×
← cancel 3x - 7y on numerator and denominator
= ×
=
=
→ C
(7)
÷
Factorise the denominators of both fractions
x² - 9 = x² - 3² = (x - 3)(x + 3) ← difference of squares
4x - 12 ← factor out 4 from each term
= 4(x - 3)
Then rewrite as
÷
← cancel 8 and 4 by 4
= ÷
• leave first fraction, change ÷ to × , turn second fraction ' upside down'
= ×
← cancel x - 3 on numerator and denominator
= ×
← cancel 2 and 6 on numerator and denominator
= → B