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Sophie [7]
3 years ago
13

Solve this please, and quick

Mathematics
2 answers:
rosijanka [135]3 years ago
8 0
Error: They subtracted 9x from both sides when they should have subtracted 12. You can’t subtract unlike terms
Correct: x=-5/16
Subtract 12 from both sides to get -5 on the left and add 7x and 9x to get 16x. Divide both sides by 16 to isolate x.
Viefleur [7K]3 years ago
3 0

Answer:

3.2

Step-by-step explanation:

7x + 12 + 9x = 7

16x + 12 = 7

       - 12    -12

16x = -5

16 divided by -5 is 3.2

x = 3.2

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What is the most precise name for quadrilateral ABCD with vertices A(–5,2), B(–3, 5),C(4, 5),and D(2, 2)?
bonufazy [111]

Answer: ABCD is a parallelogram.

Step-by-step explanation:

First we plot these point on a graph as given in attachment.

From the attachment we can observe that AD || BC || x-axis .

also, AB ||CD, that will make ABCD a parallelogram ,  but to confirm we check the property of parallelogram "diagonals bisect each other" , i.e . "Mid point of both diagonals are equal".

Mid point of AC= (\dfrac{-5+4}{2},\dfrac{2+5}{2})=(\dfrac{-1}{2},\dfrac{7}{2})

Mid point of BD= (\dfrac{-3+2}{2},\dfrac{5+2}{2})=(\dfrac{-1}{2},\dfrac{7}{2})

Thus, Mid point of AC=Mid point of BD

i.e. diagonals bisect each other.

That means ABCD is a parallelogram.

8 0
3 years ago
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lisov135 [29]
The answer is A

Explanation:
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8 0
3 years ago
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What is the domain of the function f(x) = 2x + 5?
alukav5142 [94]

There is no value that x cannot be for linear equations.

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CHOICE B.

8 0
3 years ago
2. Solve in two ways<br> 1/2 +1/4
Romashka [77]

Answer:

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6 0
3 years ago
45-45-90...find the value of x?
andrey2020 [161]

Answer:

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