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Vanyuwa [196]
3 years ago
15

Ron's Cafe has regular coffee and decaffeinated coffee. This morning, the cafe served 65 coffees in all, 26 of which were regula

r. What percentage of the coffees were regular?

Mathematics
1 answer:
bezimeni [28]3 years ago
5 0
Attached the solution and work.

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Two angles form a complementary pair (sum is 90 degrees) one angle is 3x - 10 and the other angle is x + 8. Write an equation an
Whitepunk [10]
3x-10+x+8=90
4×-2=90
4x=92
X=23

One angle is 31. 23+8
The second one is 59. 3 (23)-10
7 0
3 years ago
I need the function for the volume of the box for number 1
rjkz [21]

Answer:

Step-by-step explanation:

The volume of a rectanguiar shape like this one is V = L * W * H, where the letters represent Length, Width and Height.  Here L is the longest dimension and is 28 - 2x; W is the width and is 22-2x; and finally, x is the height.  Thus, the volume of this box must be

V(x) = (28 - 2x)*(22 - 2x)*x

and we want to maximize V(x).  

One way of doing that is to graph V(x) and look for any local maximum of the graph.  We'd want to determine the value of x for which V(x) is a maximum.

Another way, for those who know some calculus, is to use the first and second derivatives to identify the value of  x at which V is at a maximum.

I have provided the function that you requested.  If you'd like for us to go all the way to a solution, please repost your question.

3 0
2 years ago
The expression x-y equals 0.7 if x and y have certain values. Evaluate the following expression with the same values of x and y
elena55 [62]

Answer:

1/0.7

Step-by-step explanation:

The expression x-y equals to 0.7 so we have to substitute 0.7 in the place of x-y....

----> 1/0.7

Dividing would make this equal to a long division answer (1.42857142857) so let's just leave it as a fraction!

I hope this helps! :)

5 0
2 years ago
PLEASE HELP! IT’S 40 POINTS! What is the area of this octagon?
Zinaida [17]

Answer:

B) 59 cm²

Step-by-step explanation:

4x8=32

2x3=6

3x7=21

32+6+21=59 cm²

3 0
3 years ago
Is the square root of 7 greater or less then 14/5
Leto [7]

Answer:

less then

Step-by-step explanation:

the square root of 7 is 2.64 and 14/5 is = 2.8

5 0
3 years ago
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