Answer:
2nd one, 4th one, 5th one,7th one
Step-by-step explanation:
A complex fraction is a fraction where either the numerator or denominator has a fraction.
Answer:
<u>If a car is driven 15,000 miles in a year, the model predicts the annual cost of the car to be $ 6,900.</u>
Step-by-step explanation:
The model developed is:
y = $ 1,500 + 0.36x, where:
y represents the annual cost of an automobile
x represents the number of miles driven
If x = 15,000, let's solve for y:
y = 1,500 + 0.36x
y = 1,500 + 0.36 * 15,000
y = 1,500 + 5,400
<u>y = 6,900</u>
Using proportions, it is found that:
- The ratio of heights is of 1:5.
- The ratio of surface areas is of 1:25.
- The ratio of volumes is of 1:125.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
The heights are measured in units, hence the ratio is:
The surface areas are measured in units squared, hence the ratio is:
(1:5)² = 1:25.
The volumes are measured in cubic units, hence the ratio is:
(1:5)³ = 1:125.
More can be learned about proportions at brainly.com/question/24372153
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the sum of the interior angles of a quadrilateral is 360°
[360 - (40 * 2)] : 2 =
280 : 2 =
140°
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140 + 140 + 40 +40 = 360°