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3 years ago

9

Use the completed X diagram to replace the x-term in the trinomial with two x-terms. x2 + x – 42 = x2 + ? -42 Next, use double g

rouping to factor the four terms. = x(?)–(x + 7) = ? To verify, ? the factors

2 answers:

Alik [6]3 years ago

10 0

Answer:

1.7x-6x

2.x+7

3.6

4.(x-6)(x+7)

5.multiply

<em>on edge</em>

Step-by-step explanation:

dmitriy555 [2]3 years ago

8 0

Answer:

7x-6x, x+7, 6 , (x-6)(x+7), multiply

Step-by-step explanation:

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Molly had already read 6 books this year before joining a book club, and she plans to read 3 books every month now that she has

tatuchka [14]

Answer:

12 months

Step-by-step explanation:

Given data:

Before joining club 6 books read

3 books every month

total books read 42

books read after joining the club = 42 - 6

books read after joining the club = 36

Months she has in book club = 36/3

Months she has in book club = 12 months

7 0

2 years ago

A population of mice is increasing exponentially. On Monday there were 120 most. One month later there were 132 most. Ready func

djyliett [7]

Answer:

$y=120 * 1.1^x$ --- function

The monthly rate is 10%

Step-by-step explanation:

Given

Let

$x \to months$

$y \to mice$

So, we have:

$(x_1,y_1) = (0,120)$ --- Monday

$(x_2,y_2) = (1,132)$ --- One month later

Required

The function

The function is represented as:

$y=ab^x$

In $(x_1,y_1) = (0,120)$ , we have:

$120 = a * b^0$

$120 = a * 1$

$120 = a$

$a=120$

In $(x_2,y_2) = (1,132)$ , we have:

$132 = a * b^1$

$132 = a * b$

Substitute: $a=120$

$132 = 120 * b$

Solve for b

$b = \frac{132}{120}$

$b = 1.1$

So, the function is:

$y=ab^x$

$y=120 * 1.1^x$

To calculate the monthly rate (r), we have:

$y =a(1 + r)^x$

Compare to: $y =ab^x$

$1 + r = b$

Make r the subject

$r = b-1$

Substitute $b = 1.1$

$r = 1.1-1$

$r = 0.1$

Express as percentage

$r = 0.1*100\%$

$r = 10\%$

5 0

2 years ago

The sum of 5 consecutive odd numbers is 145

xeze [42]

The sum of 5 consecutive odd integers is 145. These are the other 4 consecutive odd numbers. Now if we add all of these up we will get this : 25 + 27 + 29 + 31 + 33 = 145.

Hope I helped! ☺☼

8 0

3 years ago

Ratio of dolls to teddy bears is 6:5. If the has 240 dolls how many teddy bears are there?

scZoUnD [109]

Answer:
There will be 200 teddy bears.

Explanation:
Please check the picture attached!

I hope this helps!

8 0

2 years ago

Read 2 more answers

The number of patients treated at Dr. Jason's dentist office each day was recorded for seven days: 9,

Airida [17]

Answer:

C

Step-by-step explanation:

Mean: 9+6+18+2+13+3+5= 56/7 = 8

Median: 2,3,5,6,9,13,18 the middle number is 6

mode:none

7 0

2 years ago