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givi [52]
3 years ago
12

Determine rather each equation is there not a equation. Write yes or no. if yes write equation in standard form. -2x-3=y

Mathematics
1 answer:
abruzzese [7]3 years ago
8 0
I don't know about how to put that in standard form, but an equation has to have an equals sign... So, that would be an equation.
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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
At a construction job for a mall there are 45 painters. Of these painters, 18 of them are painting the interior of the mall. Wha
Jlenok [28]

Answer:

40%

Step-by-step explanation:

18/45 × 100

2/5 × 100

40%

8 0
3 years ago
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Which part of a fraction tells how many parts it takes to make a whole? (Numerator of denominator?)
solmaris [256]
The denominator will tell how many parts it takes to make a whole


4 0
3 years ago
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The sum of three numbers is 8. twice the smaller is 2 less than the largest, while the sum of the largest and smallest is 5. use
Lorico [155]
X + Y + Z = 8
2x = Z - 2
X + Z = 5
X = 1
1 + Y + Z = 8
Y + Z = 6
1 + Z = 5
Z = 4
1 + Y + 4 = 8
5 + Y = 8
Y = 3
The variables are 1, 3, 4.
4 0
3 years ago
Change 196% to a whole number
Vesna [10]
196% = 100% + 96%

=100/100 + 96/100

=1 + 96/100 

=1.00 + 0.96

=1.96
8 0
3 years ago
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