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Juli2301 [7.4K]
3 years ago
6

Solve for x in the equation I need help ASAP​

Mathematics
2 answers:
natita [175]3 years ago
7 0

Answer:

D

Step-by-step explanation:

Given

2x² + 3x - 7 = x² + 5x + 39

Subtract x² + 5x + 39 from both sides

x² - 2x - 46 = 0 ← in standard form

with a = 1, b = - 2, c = - 46

Solve for x using the quadratic formula

x = (- (- 2) ±\sqrt{(-2)^2-(4(1)(-46)} ) / 2

  = ( 2 ± \sqrt{4+184} ) / 2

  = ( 2 ± \sqrt{188} ) / 2

  = ( 2 ± 2\sqrt{47} ) / 2

  = 1 ± \sqrt{47}

DedPeter [7]3 years ago
4 0
The answer is D

You just move all numbers to the left and set it equal to 0
And then you add all same variables together
After that you use the quadratic formula
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Solutions
Paraphin [41]
D. none of the above.
3 0
3 years ago
What is the solution set of this inequality?
Gnoma [55]

Answer:

A.

x\ge \:4

Step-by-step explanation:

8(x-5) -3x\geq -20\\\\\mathrm{Expand\:}8\left(x-5\right)-3x:\quad 5x-40\\\\5x-40\ge \:-20\\\\\mathrm{Add\:}40\mathrm{\:to\:both\:sides}\\\\5x-40+40\ge \:-20+40\\\\Simplify\\\\5x\ge \:20\\\\\mathrm{Divide\:both\:sides\:by\:}5\\\\\frac{5x}{5}\ge \frac{20}{5}\\\\Simplify\\\\x\ge \:4

8 0
2 years ago
Calculate the correct answer. <br>17x - 3 = 48​
Nadya [2.5K]

Answer: x = 3

Step-by-step explanation:

Simplifying

17x + -3 = 48

Reorder the terms:

-3 + 17x = 48

Solving

-3 + 17x = 48

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.

-3 + 3 + 17x = 48 + 3

Combine like terms: -3 + 3 = 0

0 + 17x = 48 + 3

17x = 48 + 3

Combine like terms: 48 + 3 = 51

17x = 51

Divide each side by '17'.

x = 3

Simplifying

x = 3

6 0
2 years ago
Please answer this correctly which is the correct options
Brums [2.3K]
The first, second, third, and fourth options, are all equal to 32, including the top option. So all of the are correct.
8 0
3 years ago
Please help me my moms gonna kill me if I don’t get this done(20 points)
Nutka1998 [239]

Answer:

x=30° y=4

Step-by-step explanation:

\frac{y}{8}  =  \frac{2.5}{5}

cross multiple

5y=8(2.5)

5y=20

divide 5 by 20

and you should y=4

since the polygons are similar x should have the same degrees as the bigger polygon

8 0
3 years ago
Read 2 more answers
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