Jasmine bought 30 kiwi fruit for $10. How many kiwi can Lisa buy if she has $4?

8 kiwi

Step-by-step explanation:

This is a typical proportional problem for Algebra.

You can do this problem several ways, some shorter than others, however, I want you to understand. So, with that said,

You place the following equation together:

Number of Kiwi/Dollars = Number of Kiwi/Dollars

You are given three of the values:

32 Kiwi/16 = x/4   Please notice: You know Jasmine bought 32 Kiwi for $16.00 and know she has $4.00. You do not know how many kiwi she can purchase. Do you see this?

Now, since this is an equation (an equal sign between two fractions) you can cross-multiply. When you do so you multiply the numerator on the left with the denominator on the right. Then cross-multiply the denominator from the left with the numerator on the right.

You are left with the following due to cross multiplication:

16 x = 4 (32) or 128

16x = 128  Solve for x by dividing 16 into 128 and you arrive at 8

WHY I do this problem in this manner is because you can ALWAYS check your work. In other words, plug 8 (the value for x) into the original equation. When you do so watch what happens:

Original equation: 32/16 = x/4

Then:

32/16 = x/4  or 32/16 = 8/4

Cross multiply: Does 32 times 4 equal 16 times 8?  Yes, it indeed does.

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.