All categories

3 years ago

Evaluate 2d + 3 when d = 8

Mathematics

1 answer:

vlada-n [284]3 years ago

7 0

Answer:

Step-by-step explanation:

2d+3

=2(8)+3

2*8

=16+3

=19

You might be interested in

Help please thank you giving 15 pts

slega [8]

Answer:

x=22

Step-by-step explanation:

2x-40+8x=180

10x=220

x=22

8 0

3 years ago

Read 2 more answers

Find the slope between these two points: (4,2) and (10,5)

mart [117]

Answer:

Slope is 1/2

Step-by-step explanation:

Slope Formula = m = y2 - y1/x2 - x1

Point = (4,2) and (10,5)

m = y2 - y1/x2 - x1

m = 5 - 2/10 - 4

m = 3/6

m = 1/2

4 0

3 years ago

2x-3 /(by) 3x+2 = -2/ (by) 3 Help ME PLLLEEAASSEE!

timurjin [86]

I forgot how to do this

5 0

3 years ago

2 to the negative 3rd power represented another way

Citrus2011 [14]

Answer:

1/8

Step-by-step explanation:

2^(-3) = (1/2)^3 = 1/2^3 = 1/8

5 0

3 years ago

The graphs show the amount of sugar in two kinds of juice.

gizmo_the_mogwai [7]

Answer:

Pat a) The unit rate of graph at left is $25\ \frac{grams}{cup}$

Part b) The unit rate of graph at right is $40\ \frac{grams}{cup}$

see the attached figure

Step-by-step explanation:

we know that

The unit rate of a linear equation is the same that the slope of the linear equation

step 1

Find the slope of the graph at left

This graph represent a proportional relationship (because the line passes through the origin)

The slope is equal to the constant of proportionality k

$k=\frac{y}{x}$

we have the point (1,25)

substitute the values in the formula

$k=\frac{25}{1}=25\ \frac{grams}{cup}$

step 2

Find the slope of the graph at right

we have the points (2,80) and (3,120)

This graph represent a proportional relationship (because the line passes through the origin)

The slope is equal to the constant of proportionality k

$k=\frac{y}{x}$

Is necessary only one point to determine the constant of proportionality

take the point (2,80)

substitute the values

$k=\frac{80}{2}=40\ \frac{grams}{cup}$

Verify

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have the points (2,80) and (3,120)

substitute the values

$m=\frac{120-80}{3-2}$

$m=\frac{140}{1}=40\ \frac{grams}{cup}$

8 0

3 years ago