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Dafna1 [17]
3 years ago
15

What is the value of x and give a reason

Mathematics
1 answer:
nevsk [136]3 years ago
6 0

Answer:35 degrees

Step-by-step explanation:

I used a protractor

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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
Subtract 8.3 – 2.57 =
likoan [24]

Answer:

5.73

Best of luck

Step-by-step explanation:

4 0
3 years ago
What is the LCD of 3/10 and -4/15??
Mazyrski [523]
The LCD is 30.  The fractions would be 9/30 and -8/30
8 0
3 years ago
Read 2 more answers
Jonah cut a piece of rope that was 4ft 7 inches long. How many inches is that?
hammer [34]

So as we know 1 feet = 12 inches. So we multiply 12 x 4 which is 48. Plus 7 is 55.

So the amount of inches that Jonah cut the piece of rope is 55 inches

mark me as brainliest if this answer is correct!!!

4 0
3 years ago
SEE PHOTO! If 1 measures 135°, what is the measure of 8? (Lines b and c are parallel.)
Bezzdna [24]

Answer:

Measure 8 is 135°

Step-by-step explanation:

Measure 1 and Measure 8 are alternate exterior angles.

7 0
3 years ago
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