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Assoli18 [71]
3 years ago
15

What is the solution? x^2 + 7x – 18 = 0

Mathematics
2 answers:
Drupady [299]3 years ago
7 0
When factored, you get (x - 2)(x + 9) = 0
Solve this and you have x = 2, -9
masya89 [10]3 years ago
4 0
X is equal to 2. put 2 in for X and try to solve it
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The table lists the results from a survey (of questionable accuracy) of adults and how much they spend on a night out.
daser333 [38]
You are going to make a graph. The x-axis will represent age while the y-axis represents the amount of money spent on a night out. Graph the ordered pairs, making a scatter plot. Once you have all of the points on the graph, answer the question by saying something like "the older someone is, the less money they spend on a night out" but make sure it's accurate. (:
3 0
3 years ago
Read 2 more answers
In a group of eighteen people, each person shakes hands once with each other person in the group. How many handshakes will occur
miv72 [106K]

The number of handshakes that will occur in a group of eighteen people if each person shakes hands once with each other person in the group is 153 handshakes

In order to determine the number of handshakes that will occur among 18 people, that is, the number of ways we can choose 2 persons from 18 people.

∴ The number of handshakes = ^{18}C_{2}

^{18}C_{2} = \frac{18!}{(18-2)!2!}

^{18}C_{2} = \frac{18!}{16!2!}

^{18}C_{2} = \frac{18\times17\times16!}{16!\times2!}

^{18}C_{2} = \frac{18\times17}{2\times1}

^{18}C_{2} = \frac{306}{2}

^{18}C_{2} = 153

∴ The number of handshakes = 153 handshakes

Hence. 153 handshakes will occur in a group of eighteen people if each person shakes hands once with each other person in the group.

Learn more here: brainly.com/question/1991469

5 0
2 years ago
a type of college payment of that payment you that borrow money now and pay it back with intrest later is called what type of pa
Bess [88]
It is called student loans
3 0
3 years ago
Simplify the following
marusya05 [52]

Answer:

try 6^(-1) = 0.17 or 1/6

Step-by-step explanation:

1/6 in decimal form is 1.66666... which technically should round to 1.7

if 1.7 isn't the right answer try righting it in exact form, 1/6 where there is no estimation

7 0
3 years ago
What is the interquartile range of the following numbers: 5, 7, 8, 8, 10, 12, 14, 15, 16, 18, 20?
Finger [1]
The median is 12 so:-
First quartile is 8 and 3rd quartile is 16 
so the interquartile range = 16 - 8 = 8 Answer
5 0
3 years ago
Read 2 more answers
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