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atroni [7]
3 years ago
6

In 1962, the average cost of 1 gallon of gasoline in the United States was $0.31. The cost of gasoline increased by an average o

f 3% per
year. What was the average cost of 1 gallon of gasoline in 1972​
Mathematics
1 answer:
Kobotan [32]3 years ago
7 0

Answer:

3*10=30.

Step-by-step explanation:

increased by 3% each year for 10 years

increased 30%.

0.31*0.30= .92

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Which defines a circle?
Mila [183]

Answer:

a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).

Step-by-step explana

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3 years ago
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Triangle DEF has vertices D(0,0), E(7,0), and F(3,7).
Leni [432]

Answer:

(3, 1.7)

Step-by-step explanation:

The point at which the vertices of a triangle meet is known as the orthocenter of the triangle. The orthocenter passes through the vertex of the triangle and is perpendicular to the opposite sides.

Two lines are perpendicular if the product of their slopes is -1.

The slope of the line joining D(0,0), F(3,7) is:

m_1=\frac{7-0}{3-0}=\frac{7}{3}

The slope of the line perpendicular to the line joining D and F is -3/7. The orthocenter is perpendicular to the line joining D and F and passes through vertex E(7, 0). The equation is hence:

y-y_1=m(x-x_1)\\\\y-0=-\frac{3}{7} (x-7)\\\\y=-\frac{3}{7}x+3 \ .\ .\ .\ (1)

The slope of the line joining E(7,0), and F(3,7). is:

m_1=\frac{7-0}{3-7}=-\frac{7}{4}

The slope of the line perpendicular to the line joining E and F is 4/7. The orthocenter is perpendicular to the line joining E and F and passes through vertex D(0, 0). The equation is hence:

y-y_1=m(x-x_1)\\\\y-0=\frac{4}{7} (x-0)\\\\y=\frac{4}{7} x\ .\ .\ .\ (2)

The point of intersection of equation 1 and equation 2 is the orthocenter. Solving equation 1 and 2 simultaneously gives:

x = 3, y = 1.7

4 0
3 years ago
Which equation is a quadratic model for the data set? Hint: Use a graphing calculator or a spreadsheet program.
Ivahew [28]

The equation that model a quadratic function is:  y=0.9673x²-0.8475x+10.4334

Step-by-step explanation:

A quadratic function has the form of ;

f(x) = ax²+bx+c  where a, b and c are real numbers and a≠0

For this case, equation y=0.9673x²-0.8475x+10.4334 models a quadratic function where a>0 thus the parabola opens upwards

See attached figure below to visualize the graph

Learn More

Quadratic functions graphs: brainly.com/question/9048896

Keywords : equation, quadratic model, data set, calculator, spreadsheet program.

#LearnwithBrainly

4 0
3 years ago
¿Cuál de las siguientes expresiones es equivalente a (5 ∙ 5 ∙ 5 ∙ 5)3?
frosja888 [35]

Answer:

translate: "Which of the following expressions is equivalent to (5 x 5 x 5 x 5)3?"

57???

Step-by-step explanation:

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3 years ago
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Pamela bought an electric drill at 80% of the regular price. She paid 32 for the drill. What was the regular price?
nirvana33 [79]

Answer: $40

Step-by-step explanation:

To find the whole number you divide the part by the percentage

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hope it helps

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3 years ago
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