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DochEvi [55]
3 years ago
11

Please do 8 and 9 and i will give u brainiest

Mathematics
1 answer:
nexus9112 [7]3 years ago
5 0

Answer:

i can't see the question for 8

and for 9 what object are they asking you to find the length and width of?

Step-by-step explanation:

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the sum of the reciprocals of two consecutive even integers is 9/40. this can be represented by the equation shown 1/x + 1/(x+2)
Ivanshal [37]

Answer:

  8, 10

Step-by-step explanation:

Multiplying the equation by the product of the denominators, we have ...

  40(x+2) +40x = 9x(x+2)

  80x +80 = 9x^2 +18x . . . . eliminate parentheses

  9x^2 -62x -80 = 0 . . . . . . put in standard form

  9x^2 -72x +10x -80 = 0 . . . prepare to factor by grouping

  9x(x -8) +10(x -8) = 0 . . . . . factor pairs of terms

  (9x +10)(x -8) = 0

Solutions are ...

  x = -10/9  and  x = 8

The integers are 8 and 10.

_____

<em>Comment on the attachment</em>

I find a graphing calculator to be a nice tool for solving these. It finds zeros easily, so writing the equation so it equals zero is a useful first step.

5 0
4 years ago
A group of preschoolers has 16 boys and 66 girls. What is the ratio of boys to all students
GREYUIT [131]
The ratio would be 8/41 since the total number of students is 82. (16+66). then, the ratio of boys to all students is 16/82. then, just simplify the ratio and the answer is 8/41
6 0
3 years ago
A grocery store is having a sale on a 12-pack of soda. The
statuscvo [17]

Answer:

A

Step-by-step explanation:

$16.50 original- $13.20 on sale

4 0
3 years ago
Read 2 more answers
Using a table of values, determine the solution to the equation below to the nearest fourth of a unit.
olga55 [171]

Answer:

I think letter C.x*-0.50 I'm not sure In my answer

7 0
3 years ago
A touch tank has a height of 3 feet. Its length is three
Lunna [17]

Answer:

5.5 cu ft        vol = L*w*h*  w=x L= 3x  h=3

270=  3[3x*x]

3 0
3 years ago
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