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antoniya [11.8K]
3 years ago
9

Just question number one is good the second one could do if u feel like it​

Mathematics
1 answer:
Fudgin [204]3 years ago
3 0

Answer:

1. n = 2

2. -4 = r

Step-by-step explanation:

-n - 7n = -16

subtract the like terms, like terms are terms that have the same variable or power. Ex: n and 7n are like terms as they both have n, however 7n and 16 are not. x^2 and x are not like terms as they do not have the same power so:

-8n = -16

divide both sides by -8

n = 2

-20 = 3r + 2r

add like terms

-20 = 5r

divide 5 from both sides

-4 = r

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(i) She gives each student a pretest. Then she teaches a lesson using a computer program. Afterwards, she gives each student a posttest. The teacher wants to see if the difference in scores will show an improvement.

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6 0
3 years ago
Please help! I really don't understand!
Varvara68 [4.7K]
A. yes this is a statistical question. it is a statistical question because you can answer the question by collecting data.


b. some clusters are.. 3,4,5, and 6 they are clusters because they are assembled around a particular value. the peak is 6 because it is the highest number it reaches. there are no gaps in this table.



c. to calculate the average with a graph you sum the numbers then divide by the total number of values in the set. for this table you add 1+2+3+3+4+4+4+5+5+5+5+5+5 then you divide by 15.

1+2+3+3+4+4+4+5+5+5+5+5+5=51

51 ÷ 15= 3.4



3 0
3 years ago
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