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1 year ago

D(x) = 2x − 4 and c(x) = 2x − 7 Find (d + c)(3)

Mathematics

1 answer:

Rasek [7]1 year ago

6 0

Answer: 1

Step-by-step explanation:

Find (d + c)(3) The x value is 3 so you plug in 3 for the x's in the equation

d(x) = 2x − 4

d(3) = 2(3) - 4

d(3) = 2

c(x) = 2x − 7

c(3) = 2(3) - 7

c(3) = -1

Now you plug in the value of d and c into your original equation which is (d+c)(3)

(2 + (-1)) = 1

This means (d+c)(3) = 1

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Step-by-step explanation:

x/47=82.8/92

92x=3891.6= 42.3m is the distance

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3 years ago

Andrew can run the forty yard dash in 1/2 the time that Brett can. If the sum of the two boys' times is 16.2 seconds, how many s

Zigmanuir [339]

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3 years ago

30 POINTS! Tanya has several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minute

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Of the 5 routes Tanya can choose from, 2 routes will take 30 minutes. This means that the probability is:

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3 years ago

Read 2 more answers

Select the correct answer from each drop-down menu.

finlep [7]

Answer:

Coordinates of point B are (10,-4)

Coordinates of point D are (3.6,-0.4)

Step-by-step explanation:

1) Point C(3.6, -0.4) divides in the ratio 3 : 2. If the coordinates of A are (-6, 5), the coordinates of point B are ____

Let the coordinates of B be $(x_2,y_2)$

Coordinates of A = $(x_1,y_1)=(-6,5)$

Coordinates of C=(x,y)=(3.6,-0.4)

We will use section formula over here

$x=\frac{mx_2+nx_1}{m+n} , y = \frac{my_2+ny_1}{m+n}$

m:n=3:2

$3.6=\frac{3x_2+2(-6)}{3+2} , -0.4=\frac{3y_2+2(5)}{3+2}3.6 \times 5 = 3x_2-12, -0.4 \times 5 = 3y_2+10\\18+12=3x_2 , -2=3y_2+10\\30=3x_2 , -12=3y_2\\10=x_2, -4=y_2\\$

Coordinates of B = (10,-4)

2)If point D divides in the ratio 4 : 5, the coordinates of point D are ____

(fraction)

Let the coordinates of D be $(x,y)$

Coordinates of A = $(x_1,y_1)=(-6,5)$

Coordinates of B= $(x_2,y_2)=(10,-4)$

We will use section formula over here

$x=\frac{mx_2+nx_1}{m+n} , y = \frac{my_2+ny_1}{m+n}$

m:n=3:2

$x=\frac{3(10)+2(-6)}{3+2} , y=\frac{3(-4)+2(5)}{3+2}\\x=3.6,y=-0.4$

Coordinates of point B are (10,-4)

Coordinates of point D are (3.6,-0.4)

4 0

3 years ago

FIND THE EXACT VOLUME PLEASE HELP ILL GIVE BRAINLIESTTTT

Eva8 [605]

Answer:

495 in

Step-by-step explanation:

The formula for the volume of a triangular prism is V = $\frac{1}{2}$ · w · h · l, where w represents with, l represents length, and h represents height. Using this and plugging in the values, we can solve.

V = $\frac{1}{2}$ · 5 · 11 · 18

V = 2.5 · 11 · 18

V = 27.5 · 18

V = 495

hope this helps :)

5 0

2 years ago