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Akimi4 [234]
3 years ago
9

Sharon has collected donations of $4.40, $3.12, $8.00, and $6.22 to help buy books for the new library. What is the mean (averag

e) amount of donations she has collected?
Mathematics
1 answer:
jekas [21]3 years ago
3 0

Answer:5.435

Step-by-step explanation: In math, the average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. To find this answer, we need to find the average of a set of data, we add up all the values and divide this total by the numbers of values. So if you add 4.40, 3.12, 8.00 and 6.22 together, we get 21.74. There are four values (4.40, 3.12, 8.00 and 6.22) so we divide the amount of values there are, which would be four. 21.47/4 would then get you 5.435

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Simplify (6x2 + 11x − 3) + (2x2 − 17x − 4).
d1i1m1o1n [39]

Answer:

B. 8x^2-6x-7

Step-by-step explanation:

All you have to do is combine the like terms.

Like terms are the terms that have the same variable and same exponent.

The like terms in this equation are 6x^2 and 2x^2, 11x and -17x, and -3 and -4.

When you add 6x^2 and 2x^2, you get 8x^2

When you add 11x and -17x, you get -6x

When you add -3 and -4, you get -7.

Putting these all in order, your answer is

8x^2 - 6x - 7

8 0
3 years ago
A triangle has vertices at (-9,2), (-9,-6), (-3,-6). What is the perimiter of the triangle in units?
vladimir2022 [97]

Answer:

The perimeter is 24 units

Step-by-step explanation:

Given

A = (-9,2) --- (x_1,y_1)

B = (-9,-6) --- (x_2,y_2)

C = (-3,-6) --- (x_3,y_3)

Required

Determine the perimeter

To do this, we calculate the distance AB, BC and AC.

Distance is calculated as:

d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2

So, we have:

AB = \sqrt{(-9 - -9)^2 + (2 - -6)^2

AB = \sqrt{64

AB = 8

BC = \sqrt{(-9 - -3)^2 + (-6 - -6)^2

BC = \sqrt{36

BC = 6

AC = \sqrt{(-9 --3)^2 + (2 --6)^2

AC = \sqrt{100

AC = 10

So, the perimeter (P) is:

P = AB + BC + AC

P =8 + 6 + 10

P =24

3 0
3 years ago
How many 18-pound patties can she make from 78of a pound of hamburger? We can 7 patties out of 78pound of hamburgers
myrzilka [38]

Answer: 4.3

Step-by-step explanation:

she can make 4.3, 18 pound patties out of a 78 pound of hamburger

3 0
3 years ago
A race is 10 km long markers will be placed at the beginning and the end of the race course and I each 500 m Mark how many marke
sweet-ann [11.9K]
20 Markers are needed to mark the course for the race
6 0
3 years ago
Read 2 more answers
I don’t know the answer to this question, I need help the question is in the picture!
MrMuchimi

Answer:

it is 112° .. as you will solve it like this (180-44=136) and each angle down there are equal so we will divide 136÷2 so each angle is 68° ,, finally to find x you can do it in two ways 1) (68+44) =112 or you can go with (180-68=112)

5 0
3 years ago
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