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Marrrta [24]
3 years ago
10

Evaluate - 2c + d for c = -9 and d = 4. Please help.​

Mathematics
2 answers:
blondinia [14]3 years ago
7 0

Answer:

-14

Step-by-step explanation:

2c+d

2* -9+4=18+4

-14

Svet_ta [14]3 years ago
3 0

Answer:

-14

Step-by-step explanation:

2c + d

We are given the values of c and d:

c = -9

d = 4

We substitute in these values

2(-9) + 4 = ?

2 times -9 is -18

-18 + 4 = -14

2c + d = -14

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The quadrilateral shown is rotated 90° clockwise about the origin. In which quadrant is the image of the quadrilateral located?
Viktor [21]

Answer:

Option (2). 1

Step-by-step explanation:

Coordinates of point A, B, C and D are,

A(-4, 4), B(-2, 4), C(-2, 1) and D(-4, 3).

Quadrilateral ABCD when rotated 90° clockwise about the origin,

Rule for the rotation of the vertices,

(x, y) → (y, -x)

Following the rule of rotation coordinates of the image points,

A(-4, 4) → A'(4, 4)

B(-2, 4) → B'(4, 2)

C(-2, 1) → C'(1, 2)

D(-4, 3) → D'(3, 4)

Since all image points have the positive coordinates (x and y coordinates), image quadrilateral A'B'C'D' will be located in 1st quadrant.

Option (2) is the correct option.

4 0
3 years ago
Find the volume of a sphere that has a surface area of 16 * pi sq. in.
Thepotemich [5.8K]
You can use this formula to solve this problem... it uses the surface area to find the volume.

V= (A^3/2)/(6√pi)   

Substitute the surface area value into "A" and then solve as you would on paper. I'm sorry I couldn't show you the entire process but this should get you your answer. Plus if your teacher asks for work, I just set you up and everything else should be self explanatory.  

But the answer is ---->  33.5 inches cubed
4 0
3 years ago
Need to figure out what number is rational. Thanks in advance.
GarryVolchara [31]
I think the answer you have there is correct
8 0
3 years ago
Read 2 more answers
At a local grocery store, bananas were on sale. Green bananas were priced at $14.00 and yellow bananas were priced at $12.00. Sa
garri49 [273]

Answer:

Sabrina bought 6 yellow bananas and 3 green bananas

Step-by-step explanation:

Let

Green bananas = x

Yellow bananas = y

Green bananas = $14.00

Yellow bananas = $12.00

Total cost = $114.00

x + y = 9 (1)

14x + 12y = 114 (2)

From (1)

x = 9 - y

Substitute x = 9 - y into (2)

14(9 - y) + 12y = 114

126 - 14y + 12y = 114

- 14y + 12y = 114 - 126

-2y = -12

Divide both sides by -2

y = -12 / -2

= 6

y = 6

Substitute y = 6 into (1)

x + y = 9

x + 6 = 9

x = 9 - 6

= 3

x = 3

Sabrina bought 6 yellow bananas and 3 green bananas

3 0
3 years ago
Dora spent $45 and has $32 left. Which equation can be used to calculate how much money Dora had at the beginning?
r-ruslan [8.4K]
32+45 can be used to figure out the starting amount
7 0
3 years ago
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