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erik [133]
3 years ago
15

3z2 - 2z + 8 - (10z2 +7z - 12)

Mathematics
1 answer:
klemol [59]3 years ago
4 0

Answer: 7z²-9z+20

Step-by-step explanation:

PEMDAS - Please Excuse My Dear Aunt Sally - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

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Ruslan reads 1/3 of a book every day. He needs to read 4 books for class. HOw long would it take him to read 4 books?
Korolek [52]

It would take him 12 days.


1/3 x 3 = 3

3x4=12
5 0
3 years ago
Which point represents a solution to the system graphed below
zavuch27 [327]

Answer:

(2, -4)  and (6, 0)

Step-by-step explanation:

A solution to the system of the inequalities on the graph is any point found in the shaded region.

(0,0) is not

(1,-3) is not because its on a dashed line

(2,-4) YES

(6,0) YES

3 0
3 years ago
Dylan bought 3 identical shirts online for a total cost of $71.83 including a flat rate (one time fee) of $7.99 for shipping. Wh
GaryK [48]

Answer:

The first option

Step-by-step explanation:

The second and third options are just wrong.

Good Luck!!!

5 0
3 years ago
The probability that a customer selects a pizza with mushrooms or pepperoni is , and the probability that the customer selects o
Andrej [43]

Answer:

The probability of the customer selecting both items is 0.04.

Step-by-step explanation:

The complete question is:

The probability that a customer selects a pizza with mushrooms or pepperoni is 0.45, and the probability that the customer selects only mushrooms is 0.32. If the probability that he or she selects only pepperoni is 0.17, find the probability of the customer selecting both items.

Solution:

The information provided is as follows:

P (M) = 0.32

P (P) = 0.17

P (M ∪ P) = 0.45

Compute the probability of the customer selecting both items as follows:

P(M\cup P)=P(M)+P(P)-P(M\cap P)\\\\P(M\cap P)=P(M)+P(P)-P(M\cup P)\\\\=0.32+0.17-0.45\\\\=0.04

Thus, the probability of the customer selecting both items is 0.04.

6 0
3 years ago
The first of two films lasted 3 minutes less than twice as long as the second. Together the two films lasted 132 minutes. How lo
antiseptic1488 [7]
X = first film....y = second film

x + y = 132
x = 2y - 3

2y - 3 + y = 132
3y - 3 = 132
3y = 132 + 3
3y = 135
y = 135/3
y = 45......so the 2nd film lasted 45 minutes

x = 2y - 3
x = 2(45) - 3
x = 90 - 3
x = 87 <=== the first film lasted 87 minutes
7 0
4 years ago
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