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kkurt [141]
3 years ago
8

What are the answers to these??

Mathematics
1 answer:
Mariulka [41]3 years ago
4 0
7a. Line D
7b. Lines A and B
7c. Lines A and D
7d. Lines B and D
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Identify the values that should be written to complete the X diagram.
cestrela7 [59]

Answer:

See the attachment for what goes on your X diagram.

Rewrite: x² -7x +4x -28

Grouping: (x² -7x) +(4x -28) = x(x -7) +4(x -7) = (x +4)(x -7)

Step-by-step explanation:

The given quadratic is ...

... x² -3x -28 . . . . . a=1, b=-3, c=-28

a) The value at the top of the X diagram is the product a·c = 1·(-28) = -28.

The value at the bottom of the X diagram is the coefficient b = -3.

The values on the sides of the diagram are the factors of -28 that add up to make -3. These are -7 and 4. That is, ...

(-7)·(4) = -28

(-7)+(4) = -3

b) Since the two values on the sides of the diagram add up to give "b", the value of "b" in the equation can be rewritten as the sum of these two numbers. Doing that, we have ...

... x² -3x -28

... = x² +(-7+4)x -28

... = x² -7x +4x -28 . . . . . . order does not matter. It could also be x² +4x -7x -28

c) We can group pairs of terms in the rewritten expression and factor each pair.

... = (x² -7x) +(4x -28) . . . . . first pair has a common factor of x; second pair, 4

... = x(x -7) +4(x -7) . . . . . . . these terms now have a common factor: (x -7)

... = (x +4)(x -7) . . . . . . . . . . the complete factorization of x² -3x -28

3 0
3 years ago
What two simpler problem can you use to find 9×38?
elena55 [62]
Just a shot in the dark: 9*30 and 9*8?
8 0
3 years ago
The length of RT is 4x-4.Given that point S is between point R and T,
Monica [59]

Answer:

RS = 32

Step-by-step explanation:

Set-up equation like this -- 2x+6+16=4x-4

Solve for x

Then plug x in for the length of RS. You should get 32 for RS.

7 0
3 years ago
8.29 in two different ways
ad-work [718]

Answer:

0.829 8.29/1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Matt has a 13.5-ounce bag of raisins and a 25.7-ounce bag of granola mix. He puts an equal amount of the combined rasin and gran
astraxan [27]

Answer:

i can tell u in prsn

Step-by-step explanation:

4 0
3 years ago
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