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Vikentia [17]
2 years ago
15

Evaluate the expression when r = 3. 15r

Mathematics
1 answer:
Liula [17]2 years ago
8 0

Answer:

45

Step-by-step explanation:

Because if you replace the r with 3, it would be 15(3).

15(3) is the same as 15 × 3.

15 × 3 = 45

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372.2 is what percent of 642
Sveta_85 [38]

Answer:

57.97507788%

Step-by-step explanation:

Write the problem as a mathematical expression.

<u>372.2</u>

642    

Multiply by 100 to convert to a percentage.

<u>372.2</u>

642     * 100

Simplify

<u>372.2.</u>

642.      * 100 = 57.97507788%

<u />

3 0
1 year ago
Solve the system by graphing. Write the solution as an ordered pair. y = 1/3x + 2 y = –x – 2
Dima020 [189]
ANSWER

The solution is where the two graphs intersect, which is
(-3,1).

EXPLANATION

The given system of equations are
y = \frac{1}{3} x + 2
and

y = - x - 2

We need to graph the two equations.

Let us graph

y = \frac{1}{3} x + 2
first.

We need at least two points.

You can choose any appropriate value for x and solve for y. Choosing zero makes our working easier. So let us plot the intercepts.

When
x = 0

\Rightarrow \: y = \frac{1}{3} (0) + 2

\Rightarrow y = 0 + 2

\Rightarrow y = 2

So this gives us the ordered pair,

(0,2)

When
y = 0
we get,

0= \frac{1}{3} x + 2

\Rightarrow \: - 2 = \frac{1}{3} x

\Rightarrow \: - 2 \times 3= x

\Rightarrow \: -6= x
This also gives the ordered pair

(-6,0).

We plot these two points and draw a straight line through them to obtain the blue graph in the attachment.

For the second line

y = - x - 2

We again find the intercepts and plot them.

When
x = 0

y = - 0 - 2

\Rightarrow \: y = - 2

This gives the ordered pair

(0,-2)

Also, when
y = 0

then we have,

0 = - x - 2

2 = - x

x = - 2

Then we again have the ordered pair,

(-2,0)

We plot these two points on the same graph sheet to obtain the red graph above.

The intersection of the two lines is
(-3,1)


You will get good grades so don't worry much.

4 0
3 years ago
Which point do the graphs of f and g have in common?
pickupchik [31]

The point that the graphs of f and g have in common are (1,0)

<h3>How to get the points?</h3>

The given functions are:

f(x) = log₂x

and

g(x) = log₁₀x

We know that logarithm of 1 is always zero.

This means that irrespective of the base, the y-values of both functions will be equal to 0 at x=1

Therefore the point the graphs of f and g have in common is (1,0).

Learn more about graph on:

brainly.com/question/19040584

#SPJ1

6 0
2 years ago
B. There are 47 cats. There are 18 fewer cats than birds. How many birds are in
ivolga24 [154]

Answer:

65

Step-by-step explanation

47 + 18 = 65

6 0
3 years ago
Find the circumference and the area of a circle with radius 9 m
Natasha2012 [34]

Answer:

56.55

Step-by-step explanation:

2*3.14*9^2

8 0
3 years ago
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