MATHEMATICS HIGH SCHOOL

57 = -8x – 7 helpppppp

Answers

Answer 1
Answer:

57 = -8x - 7

Add 7 to both sides:

64 = -8x

Divide both sides by -8:

X = 64/-8

X = -8
Answer 2
Answer:

Answer:

x = -8

Step-by-step explanation:

57 = -8x - 7

+7           +7

64 = -8x

64/-8

x = -8

Check:

57 = -8(-8) - 7

57 = 64 - 7

57 = 57

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Let f(x) = x^2 and g(x) = x-6. find (f o g)(-3). please help.

Answers

Answer:

81

Step-by-step explanation:

f o g = f(g(x))

Step 1. Solve for g(-3)

-3 - 6 = -9

Step 2. Solve for f(-9)

-9^2 = 81

Miriam has 62 feet of fencing to make a rectangular vegetable garden. Which dimensions will give Miriam the garden with greatest area.

Answers

Given: 
62 feet of fencing = perimeter

P = 2 (L + W)

62/2 = 31
16 + 15 = 16 * 15 = 240 ft²
17 + 14 = 17 * 14 = 238 ft²
18 + 13 = 18 * 13 = 234 ft²
19 + 12 = 19 * 12 = 228 ft²
20 + 11 = 20 * 11 = 220 ft²

The best dimensions that will give the greatest area is to have a length of 16 feet and a width of 15 feet.

At the beginning of each year, Bill Ross invests $1,400 semi-annually at 8 percent for 9 years. The cash value of the annuity due at the end of the ninth year is: ...?

Answers

The correct answer would be D. $37,339.68.

To solve this, 
$1,400 x 27.6712 = $38,739.68 - 1,400.00 = $37,339.18

This is what the cash value of the annuity due at the end of the ninth year is if Bill Ross invests $1,400 semi-annually at 8 percent for 9 years.

Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help. 

A) show that $n(2n + 1)(7n + 1)$ is divisible by 6 for all integers $n$.b.find all integers $n$ such that $n(2n + 1)(7n + 1)$ is divisible by 12.

Answers

Hi,

A)
(n(2n+1)(7n+1))/(6) \n= (14n^3+9n^2+n)/(6) \n= (12n^3+6n^2)/(6) + (2n^3+3n^2+n)/(6) \n=2n^3+n^2+ (n(2n^2+3n+1))/(6) \n= 2n^3+n^2+ (n(n+1)(2n+1))/(6) \n= 2n^3+n^2+ 1^2+2^2+3^2+...+n^2\ is\ an\ integer.

B)
Only if n=4*k or n=4*k+1 , k beeing an integer.

There are 56 students going on a field trip to the science center in groups of 8 how many groups of students are here

Answers

There are seven groups
There are 7 students in each group

On a coordinate plane, a line goes through (negative 5, negative 4) and (0, negative 3). A point is at (negative 2, 2). What is the equation of the line that is parallel to the given line and passes through the point (–2, 2)?

Answers

Answer:

y=1/5x+12/5

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Answer:

y=1/5x+12/5

Step-by-step explanation:

took the testttt :))
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