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2 years ago

How do I simplify this by combining like terms

Mathematics

1 answer:

pickupchik [31]2 years ago

7 0

You would simplify this expression by adding the coefficients 14 and -5.
$14x^{2} -5^{2}\\ 9x^{2}$

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If A = (0,0) and B = (8,2), what is the length of AB

Marina CMI [18]

Answer:

Hope the picture will help you

8 0

1 year ago

If the number of Conference participants decreases by 20% compared to last year, there would be 1760 participants this year. If

Basile [38]

2,640 this year
2,112 last year

the 1760 is 20% less than - so 120% of 1760 is the previous year:
1760 * 1.2 = 2112

2112 increased by 25% is a total of 125%:
2112 *1.25 = 2640

7 0

2 years ago

Read 2 more answers

Lydia recorded the grade-level and instrument of everyone in the middle school School of Rock below.

neonofarm [45]

Answer:

31/42

Step-by-step explanation:

there are 42 students in 8th grade

31 dont play keyboard so 31/42 = 73.8% chance

6 0

2 years ago

A store received a shipment of soup cans. The clerk put an equal number of cans on each of 4 shelves. Write an equation to repre

icang [17]

To represent the number of cans in each shelf you will divide the total number of cans by the number of shelves.

This is represented as
t/4 = n.

8 0

2 years ago

Read 2 more answers

A die with six faces has the number 1 painted on three of its faces, the number 2 painted on 2 of its faces, and number 3 on one

salantis [7]

Answer:

a) S = {1, 2, 3}

b) P(odd number) = $\frac{2}{3}$

c) No

d) Yes

Step-by-step explanation:

a) The sample space is the set of all possible outcomes. By definition, the elements of a set should not be repeated. Hence, the sample space S = {1, 2, 3}

However, the sample is not equiprobable because each element has different probabilities.

b) P(odd number) = $\frac{number of odd digits}{number of faces}=\frac{4}{6}=\frac{2}{3}$

Note that the odd numbers are 1 (on three faces) and 3 (on one face).

c) The fact the die has been biased does not change the possible outcomes. It only changes the probability of getting any given number.

d) Because the 3-face has been loaded, this probability changes. In fact, it is calculated thus:

Let's assume the probability for 1 or 2 is $x$ . Then that of 3 is $2x$ (because it is twice the others). The sum of probabilities must be 1.

$x+x+x+x+x+2x=1$

$7x=1$

$x=\frac{1}{7}$

P(odd number) = $3\times$ Prob(1) + Prob(3)

= $3\times\frac{1}{7}+\frac{2}{7}$ = $\frac{5}{7}$

7 0

2 years ago