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Y_Kistochka [10]
2 years ago
14

The ratio of the number of Sam's CDs to the number of Alice's CD's is 7 to 8. Sam has 84 CDS.

Mathematics
1 answer:
Alex2 years ago
7 0

Answer:

180 CDs

Step-by-step explanation:

So if Sam has 84 CDs, and the ratio from Sam to Alice is 7:8, we can do 84/7=12 so each number is equal to 12. Then we add up 7 and 8 and get 15, so we do 15*12 and we get 180.

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Solve for the value of k. (k+8) 400​
pashok25 [27]

Answer:

value of k = 6

Step-by-step explanation:

sum of all angles forming a straight line = 180°

so,

  • 7k + 8 + 90 + 40 = 180
  • 7k + 138 = 180
  • 7k = 180 - 138
  • 7k = 42
  • k = 42/7
  • k = 6

hence the value of k = 6

3 0
3 years ago
a triangle has area 49.5 cm^2. if the base of the triangle is 9 cm, what is the height of the triangle
Anika [276]
Area of a triangle = (height * base ) / 2

height = (Area * 2) / base
height = (49.5 * 2) / 9
height = 99 / 9
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3 0
3 years ago
The diagonals of a rectangle are always
guapka [62]

Answer:

The diagonals of a rectangle are always congruent

7 0
2 years ago
Read 2 more answers
Help please!!!!!!!!!<br> A. (1, -2)<br> B. (1, 2)<br> C. (2, -1)<br> D. Infinite number of solutions
Maru [420]

Answer:

(1, -2)  Option A in your list of possible answers

See attached image.

Step-by-step explanation:

We need to graph the lines by using a couple of points on the plane for each equation.

For example:

the points (0, -3)  and (3, 0) for the line  y = x - 3

and the points (0, 1) and (-1, 4) for the line  y = - 3 x + 1

Please see the lines in the attached image, and notice that they intersect at the point (1, -2), which gives you the solution for the system.

4 0
2 years ago
This figure shows y=f(x), the graph of the function f. If the function g is defined as g(x)= 2•f(x)-1, what is the value of g(1)
uranmaximum [27]

This is a nice twist to see if you can read the graph and interpret what it means.

f(1) is the y value of the graph when x = 1

So start at x = 1 and find the y value. Go straight up. The point you reach is (1,3)

so g(1) = 2*f(1) - 1

g(1) = 2*3 - 1

g(1) = 5

Answer

g(1) = 5

8 0
3 years ago
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