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3 years ago

Evaluate the expression when x=3, y= -4, and z= -6 xy _ z

Mathematics

1 answer:

NeTakaya3 years ago

3 0

The answer is probably 2 because if you plug in the numbers you would get
3x-4=-12 divided by -6 = +2.

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Traveling with a speed of 70 mph, a car covered a distance D miles in T hours. Write an equation that relates the distance D thi

irina [24]

Answer:

Part A) $D=70T$

Part B) $D=105\ miles$

Step-by-step explanation:

Par A) Write an equation that relates the distance D this car travels in T hours

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

The speed is a proportional relationship between the distance and the time

Let

D ----> the distance in miles

T ----> the time in hours

$D=kT$

In this problem the constant of proportionality k represent the speed of the car in miles per hour

we have

$k=70\ mi/h$

substitute

$D=70T$

Part B) Use the equation to find the distance the car travels between 3:30 p.m. and 5:00 p.m

we know that

The time between 3:30 p.m. and 5:00 p.m is equal to

5:00 p.m-3:30 p.m=1.5 hours

For T=1.5 h

substitute in the equation and solve for D

$D=70(1.5)$

$D=105\ miles$

7 0

3 years ago

Ryan earns $32,600 a year. He pays 21% of his gross income for federal, state, and local taxes. He is taxed at the FICA rate of

Schach [20]

Answer:

$22,832.47

Step-by-step explanation:

$32,600.00 × 21% = $6,846.00

$32,600.00 - $6,846.00 = $25,754.00

$25,754.00 × 7.65% = $1,917.18

$25,754.00 - $1,917.18 = $23,783.82

$23,783.82 × 4% = $951.35

$23,783.82 - $951.35 = $22,832.47

3 0

3 years ago

What is 2√47. please help me. I need this ASAP

Stolb23 [73]

Answer:

13.7113092008

Step-by-step explanation:

hope this helps

4 0

2 years ago

Read 2 more answers

If f(x) = 3 - 2x and g(x)= 1/(x+5),what is the value of (f/g) (8)?

Alekssandra [29.7K]

Answer:

(f/g)(8) = -169

Step-by-step explanation:

Simply plug in <em>x </em>= 8 into our equation:

$\frac{3-2(8)}{\frac{1}{8 + 5} }$

$\frac{-13}{\frac{1}{13} }$

-13(13)

-169

4 0

3 years ago

A tangent is >insert answer here< to the radius that shares the point of tangency

tatuchka [14]

A tangent line is always perpendicular to the radius that shares the point of tangency. In other words, where your tangent line touches the circle (at only one point), that line is perpendicular to the radius at that point.

3 0

3 years ago