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GrogVix [38]
3 years ago
15

Multiply: (x + 3)(x – 4)

Mathematics
1 answer:
vitfil [10]3 years ago
7 0

Answer:

- x

Step-by-step explanation:

(x + 3)(x - 4) \\  =  x(x - 4) + 3(x - 4) \\  =  {x}^{2}  - 4x + 3x - 12 \\  =  {x}^{2}  - x - 12 \\ middle \: term \:  =  - x

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Marine fuel is a combination of gasoline and motor oil. The standard gasoline and oil mixture is about 98% gasoline and about 2%
Georgia [21]

Answer:

0.98g+ 0.02m= 7.1224 gallons standard mixture

0.96g+ 0.04m= 6.25 gallons break oil

3.92 gallons of gasoline  is required for  4 gallons the standard mixture

Step-by-step explanation:

If we have to use 6 gallons of gasoline this means that 98%= 6 gallons and 2% would be 6/98*2

Gasoline: Motor oil

6              :    x

98        : 2

Using the product rule

x= 6*2/98= 0.1224 gallons of motor oil is required.

Let the gasoline be represented by g and motor oil by m then for the standard oil the equation would be

0.98g+ 0.02m= 7.1224 gallons standard mixture

For break in oil

Gasoline: Motor oil

6              :    x

96        : 4

Using the product rule

x= 6*4/96= 0.25 gallons of motor oil is required.

Let the gasoline be represented by g and motor oil by m then for the break oil the equation would be

0.96g+ 0.04m= 6.25 gallons break oil

Part b. For  4 gallons of the "break in" mixture

96% of the 4 gallons of the "break in" mixture is gasoline =  3.84 gallons of gasoline

4% of 4 = 0.16 gallons of motor oil

Now the standard mixture 4 gallons would contain 98 % of gasoline and 2 % of motor oil

98% of 4 gallons= 3.92 gallons of gasoline

2% of  4 gallons= 0.08 gallons of motor oil.

6 0
3 years ago
Which two numbers on the number line have an absolute value of 3?
lorasvet [3.4K]

Answer:

-3 and 3

Step-by-step explanation:

Both are 3 away from 0, so they have an absolute value of 3.

6 0
4 years ago
Read 2 more answers
In the expression 4×(2+6), how does having the 4× in front of the parentheses affect the overall value of the expresssion
lina2011 [118]
It is the multiplying factor for the whole equation if that makes sense.
8 0
4 years ago
Read 2 more answers
2. "The quotient of a number and 4"
vesna_86 [32]

Answer:

Step-by-step explanation:

let n= number, the quotient of a number and 4 is

n/4

8 0
3 years ago
-3x+2(-6xsqared+13x-6
Alexeev081 [22]
- 3x + 2 ( - 6x² + 13x - 6 )
= - 3x - 12x² + 26x - 12
= - 12x² + 23x - 12
3 0
3 years ago
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