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Misha Larkins [42]
2 years ago
12

How do I solve these problems?

Mathematics
1 answer:
topjm [15]2 years ago
8 0
6) 18,26,34
Add 8 each time
… 42,50,58,66,74,82,90,98,106,114,122,130
The 15th term in the sequence would be 130
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What is the value of 4x2 + 5x when x= 1?
Darina [25.2K]

Answer:

13

Explanation:

Insert 1 for 'x'

(4)(1)(2) + 5(1)

(4)(1)(2) = 8

5(1) = 5

8 + 5 = 13

6 0
2 years ago
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Find the length and width of a rectangle whose perimeter is 20 feet and whose area is 21 square feet
ipn [44]

Answer:

Length = 3

Width = 7

Step-by-step explanation:

The perimeter is 20 feet

The area is 21 feet

Let x represent the length

Let y represent the width

20 = 2(x+y)

x+y= 20/2

x+y = 10.........equation 1

x × y= 21......equation 2

From equation 1

x= 10-y

Substitute 10-y for x in equation 2

(10-y)y= 21

10y - y^2 = 21

y^2 -10y + 21= 0

After factorization the result will be

(x-3)(y-7)

x-3= 0

x= 0+3

x= 3

y-7= 0

y= 0+7

y= 7

Hence the length is 3 and the width is 7

6 0
3 years ago
What is the next number in the sequence 3, 12, 24, 33, 66
ExtremeBDS [4]
75.
Explanation: from 3 to 12, you add 9, and then double the 12 to get to 24, and then add 9 again to get to 33, and double it to get 66, so the pattern is to add 9 and then double.
4 0
3 years ago
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Many universities and colleges have instituted supplemental instruction (SI) programs, in which a student facilitator meets regu
aev [14]

Answer:

Step-by-step explanation:

Let many universities and colleges have conducted supplemental instruction(SI) programs. In that a student facilitator he meets the students group regularly who are enrolled in the course to promote discussion of course material and enhance subject mastery.

Here the students in a large statistics group are classified into two groups:

1). Control group: This group will not participate in SI and

2). Treatment group: This group will participate in SI.

a)Suppose they are samples from an existing population, Then it would be the population of students who are taking the course in question and who had supplemental instruction. And this would be same as the sample. Here we can guess that this is a conceptual population - The students who might take the class and get SI.

b)Some students might be more motivated, and they might spend the extra time in the SI sessions and do better. Here they have done better anyway because of their motivation. There is other possibility that some students have weak background and know it and take the exam, But still do not do as well as the others. Here we cannot separate out the effect of the SI from a lot of possibilities if you allow students to choose.

The random assignment guarantees ‘Unbiased’ results - good students and bad are just as likely to get the SI or control.

c)There wouldn't be any basis for comparison otherwise.

5 0
2 years ago
1) A building is 190 feet tall and has a shadow that is also 190 feet. Determine the angle of elevation from the tip of the shad
iren2701 [21]

Answer:

C. 45

Step-by-step explanation:

4 0
3 years ago
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