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sergeinik [125]
3 years ago
7

Which expression is equal to p + (q + r)?

Mathematics
2 answers:
Verdich [7]3 years ago
5 0
The answer is letter B.
ANTONII [103]3 years ago
4 0
Your answer is B. (p + q) + r
This is because when doing addition, the order of the addition doesn't matter, as in both instances all of the terms are getting added together. I hope this helps!
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About 57 people rent skates at the skating rink each day. It cost $4.25 to rent skates. About how much does the Rink make in ska
seraphim [82]

Answer:1695.75

Step-by-step explanation:

We know that there are 7 days in a week. Since 57 people rent skates each day, we know that 57*7=399 skates are rented each week. Since one skate cost 4.25, we know that 399*4.25 is the cost, which is 1695.75. (If you are not allowed to use a calculator, you can do 400*4.25-4.25, to make it easier to compute)

4 0
3 years ago
If f(z)=m^z - n^z, and f(1)=2, f(2)=8. Find f(3).
Marina CMI [18]
If f(z)=m^z - n^z <span>and f(1)=2, f(2)=8
then
m -  n = 2 so m = n + 2 
m^2 - n^2 = 8

substitute </span>m = n + 2  into m^2 - n^2 = 8

so
m^2 - n^2 = 8
(n + 2)^2 - n^2 = 8
n^2 + 4n + 4 - n^2 = 8
4n = 4
  n = 1

m = n + 2 = 1 + 2 = 3

so f(z) = 3^z - 1^z

if z = 1 the f(1) = 3^1 - 1^1 = 2
if z = 2 the f(2) = 3^2 - 1^2 = 9 - 1 = 8
if z = 3 the f(3) = 3^3 - 1^2 = 27 - 1 = 26

answer
f(3) = 26

3 0
3 years ago
The vertex form of the equation of a parabola is y=2(x+4)^2-7. What is the standard form of the equation.
Elan Coil [88]

Answer:


Step-by-step explanation:

To obtain the standard form of the equation of the parabola y=2(x+4)^2-7, first perform the indicated operations:

y = 2[x^2 + 8x + 16 - 7], or

y = 2[x^2 + 8x + 9],

or y = 2x^2 + 16x + 18

None of the given possible answers match.  The fourth one, D, is closest to the above result, differing only in the constant term (25 versus 18).

6 0
3 years ago
Topic/what am learning:
zloy xaker [14]
4 7/8 + 11 1/2 = 16 3/8
4 + 7/8 + 11 + 1/2
4 + 11 = 15
7/8 + 1/2 = 7/8 + 4/8 = 11/8
11/8 = 1 3/8
15 + 1 + 3/8 = 16 3/8
3 0
2 years ago
Help? This 9th grade math
kramer

Answer:

x = 47 degrees

Step-by-step explanation:

ok so the 2 lines m and n are parallel while going through line t

so since this is true

x is the same as the corresponding angle which is 47 degrees

x = 47 degrees

6 0
3 years ago
Read 2 more answers
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