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Rina8888 [55]
3 years ago
8

Find the sum and express it in simplest form. (3a^2 + 2a) + (5a^-a -7) ​

Mathematics
1 answer:
fredd [130]3 years ago
7 0

Answer:

8a^2+a-7

Step-by-step explanation:

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The class has n students, and n is an even number. The students are forming teams to work on their homework. Each team has exact
yuradex [85]

Answer:

Distinct ways  in which they all can form the teams for the class = n(n-1)

Step-by-step explanation:

Total numbers of students = n (even number)

Number of student in each team = 2

Number of distinct ways are there to form the teams for the class:

P^{n}_{k}=\frac{n!}{(n-k)!}

where = n = number of elements  = n

k = number of elements choose = 2

P^{n}_{2}=\frac{n!}{(n-2)!}=\frac{n\times (n-1)\times (n-2)!}{(n-2)!}

=n\times (n-1)

8 0
3 years ago
HELP ASAP! QUESTIONS ARE BELOW ALONG WITH PICTURES!
shutvik [7]

Answer:

1.) 65  2.)73 acute 3.)Obtuse, scalene


3 0
3 years ago
What is an equivalent ratio
gayaneshka [121]

Answer:

Equivalent ratios (which are, in effect, equivalent fractions) are two ratios that express the same relationship between numbers. We can create equivalent ratios by multiplying or dividing both the numerator and denominator of a given ratio by the same number. Two ratios that have the same value are called equivalent ratios. To find an equivalent ratio, multiply or divide both quantities by the same number. It is the same process as finding equivalent fractions.

5 0
2 years ago
Read 2 more answers
Janice bought 4 shirts that are red green white and yellow and 3 pairs of pants that are black, light blue and dark blue use an
Talja [164]

Answer:

16.7%

Step-by-step explanation:

The first thing is to mention that they are two independent events, therefore the final probability is the multiplication of the two.

First event, select shirt. In total there are 4 and you must choose one of them, therefore the probability is:

1/4

Second event, select the pants. In total there are 3 and you must choose one of them, but there are two blue types, therefore any of the two is worth what means that the probability is:

2/3

The final probability:

P = 1/4 * 2/3

P = 0.167

Which means that the probability of choosing a white shirt and a blue pant (light or dark) is 16.7%

6 0
3 years ago
13 and 14, 10 points no links please
katen-ka-za [31]
13: C
14: B
For 13, plug the 9 into the equation where b is, you get 3 • 9 = 27 (the 27 is s)
For 14, ordered pairs go horizontal distance first then vertical distance
5 0
3 years ago
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