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Oliga [24]
3 years ago
8

What is (2x-6)(3x-5) equaled to?

Mathematics
2 answers:
Luba_88 [7]3 years ago
8 0

Answer:

6x^2-28x+30

Step-by-step explanation:

Montano1993 [528]3 years ago
4 0

(2x-6)(3x-5)

multiply the two brackets together

(2x)(3x)=6x^2

(2x)(-5)=-10x

(-6)(3x)=1-8x

(-6)(-5)=30

6x^2-10x-18x+30

Answer:

6x^2-28x+30

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5. (01.07)<br> Solve 3x - x + 2 = 12. (1 point)
mafiozo [28]

Answer:

x = 5

Step-by-step explanation:

Simplify. First, combine like terms:

3x - x + 2 = 12

(3x - x) + 2 = 12

(2x) + 2 = 12

2x + 2 = 12

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

& is your order of operation.

First, subtract 2 from both sides:

2x + 2 (-2) = 12 (-2)

2x = 12 - 2

2x = 10

Next, divide 2 from both sides:

(2x)/2 = (10)/2

x = 10/2

x = 5

5 is your answer for x.

Check: Plug in 5 for x in the equation. Solve:

3(5) - (5) + 2 = 12

15 - 5 + 2 = 12

10 + 2 = 12

12 = 12 (True)

~

7 0
3 years ago
Read 2 more answers
A submarine started at sea level and was 400 meters below sea level in 10 minutes.
ladessa [460]
Because it is BELOW sea level after 10 minutes, it straight away cannot be A) or B), because ascended means going up, so it has to be either C) or D). 

I believe the answer is C), as the answer for D) would be -40 meters per minute, but it's still 40. I'm not sure though, so it's either C) or D). 
3 0
3 years ago
A textbook store sold a combined total of 274 psychology and biology textbooks in a week. The number of psychology textbooks sol
Shalnov [3]

Answer:176 psychology textbooks and 98 Biology textbooks were sold.

Step-by-step explanation:

Let x represent the number of psychology textbooks that were sold.

Let y represent the number of biology textbooks that were sold.

textbook store sold a combined total of 274 psychology and biology textbooks in a week. This means that

x + y = 274 - - - - - - - - - - -1

The number of psychology textbooks sold was 78 more than the number of biology textbooks sold. This means that

x = y + 78

Substituting x = y + 78 into equation 1, it becomes

y + 78 + y = 274

2y = 274 - 78

2y = 196

y = 98

x = y + 78 = 98 + 78

x = 176

6 0
3 years ago
Read 2 more answers
In the below system, solve for y in the first equation.
Flura [38]
C
x - 3y =  - 6 \\  - 3y =  - 6 - x \\ \frac{ - 3y}{ - 3}  =  \frac{ - 6 - x}{ - 3}  \\ y = 2 - x \\or  \\ y =  - x  + 2
5 0
3 years ago
HOW DO I SOLVE THIS PLEASE HELP
LenKa [72]

Answer:

64

Step-by-step explanation:

Euclide's theorem states that in a right triangle, the square built of the side lenght is equivalent of the rectangle with sides hypotenuse and projection of the same side lenght. In formula, given the measures on the triangle:

60^2 = (36+x)(36) \rightarrow 3600 = 36(x+36) \rightarrow 100=x+36\\ x=64

3 0
2 years ago
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