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bogdanovich [222]
3 years ago
8

- LT2XO 3) (5y2 – 2xy + 6x² – 3x + 7y - 9) + (3x² - 4x + 5) – (5y2 – 3y +6)

Mathematics
1 answer:
Anestetic [448]3 years ago
8 0

Answer:

(1, -1)

Step-by-step explanation:

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A Rectangular has area 12a^2 and perimeter 14a what are the dimensions of this Rectangular?​
Nataliya [291]

9514 1404 393

Answer:

  3a by 4a

Step-by-step explanation:

For dimensions L and W, the area and perimeter are ...

  A = LW = 12a^2

  P = 2(L+W) = 14a

Using the second equation, we can find L:

  L +W = 7a . . . . . divide by 2

  L = 7a -W

Substituting into the area formula gives the quadratic ...

  (7a -W)(W) = 12a^2

  W^2 -7aW +12a^2 = 0 . . . . arrange in standard form

  (W -3a)(W -4a) = 0 . . . . . . . factor (find factors of 12 that total 7)

Then we have the two solutions ...

  W = 3a, L = 4a

  W = 4a, L = 3a

The rectangle dimensions are 3a by 4a.

5 0
3 years ago
Help fast please I going to fail
Scilla [17]

Answer:

  1. 0.5
  2. 0.25
  3. 0.4
  4. 1.05
  5. 0.05
  6. Hope this helps
4 0
2 years ago
Martha drew a pair of intersecting non-perpendicular lines, I and m. She numbered one pair of vertical angles <1 and <2, a
RUDIKE [14]

Answer:

  • D. Because <1 and <2 are each supplementary to <3, they are therefore congruent

Step-by-step explanation:

A. m<1 + m<2 + m<3 + m<4 = 360

  • Incorrect in terms of the proof

B. The sum of the measures of angles of a triangle is 180°

  • Not relevant

C. The measure of all right is 90°

  • Not relevant

D. Because <1 and <2 are each supplementary to <3, they are therefore congruent

  • Correct
8 0
3 years ago
Games Galore Super Store buys the latest video game at a wholesale price of $58.00. The markup rate at Game’s Galore Super Store
IgorC [24]

Answer:

Step-by-step explanation:

30 + .40(30) =  30(1 + .40)  = 30(1.4)  = $42

5 0
3 years ago
How many terms are in the expression 2x + 3x + 4 + 2y?
Luden [163]

Answer:

7 terms

Step-by-step explanation:

A term is a single mathematical expression. It may be a single number (positive or negative), a single variable ( a letter ), several variables multiplied but never added or subtracted. Some terms contain variables with a number in front of them. ... Examples of single terms: 3x is a single term.

6 0
2 years ago
Read 2 more answers
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