Answer:
she bought 5 cards, which equals to $54
and then she bought 1 card
Step-by-step explanation:
<h3>
Answer: 320 square meters</h3>
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Explanation:
The scale factor 4 means the dimensions of the second rectangle are 4 times larger.
The width of 4 meters bumps up to 4*4 = 16 meters.
The length of 5 meters becomes 4*5 = 20 meters.
So a 4 by 5 rectangle is similar to a 16 by 20 rectangle.
The area of the second rectangle is therefore 16*20 = 320 square meters.
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As an alternative, you can compute the area of the 4 by 5 rectangle to get 4*5 = 20. Then multiply this with 4^2 = 16 to get 16*20 = 320.
The 4^2 = 16 multiplier is the result of squaring the scale factor.
So if you know the dimensions have been multiplied by 4, then the area has been multiplied by 16.
Answer: a. 450
b. 7950
Step-by-step explanation:
If Cheryl earns 6% interest during the 6 years she will have
(7500*6)/100=450
450 is the interest that she received
her new balance will be
7500+450=7950
Answer:
42
Step-by-step explanation:
Set the numbers in order from least to greatest, then find the one in the middle, which will be the median.
19, 23, 42, 56, 67
42 is in the middle, so it is the median.
Answer:
C
Step-by-step explanation:
x^3+4x^2-9x-36=0
or x²(x+4)-9(x+4)=0
or (x+4)(x²-9)=0
or (x+4)(x+3)(x-3)=0
x=-4,-3 or 3
