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Alex777 [14]
3 years ago
12

Simplify the expression -4x^2(3x − 7).

Mathematics
2 answers:
satela [25.4K]3 years ago
5 0

Answer:

Step-by-step explanation:

Simplify the expression -4x^2(3x − 7).

A. -12x^3 + 28

<h2>B. -12x^3 + 28x^2<= your answer</h2>

C. -12x^3 − 28

D. -12x^3 − 28x^2

Ksivusya [100]3 years ago
4 0

Answer:

B) -12x³ + 28 x².Step-by-step explanation:

Given  : -4x²(3x − 7).

To find : Simplify the expression

Solution : We have given that

-4x²(3x − 7).

Distribute  -4x² over 3x − 7.

-4x² (3x)  -  -4x²( 7).

-12x³ + 28 x².

Therefore, B) -12x³ + 28 x².

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Cheryl and her sister Diane walk to school along the same route. Cheryl walks at an average of
STALIN [3.7K]

The distance between their house and the school from the information given will be 777.60 meters.

<h3>How to calculate the distance?</h3>

The distance between their house and the school will be:

= 80 × 81 × 12

= 77760cm

= 777.60 meters.

When Diane takes 16 min to walk to school, the length of her steps will be:

= 77760/(16 × 90)

= 54 cm

Learn more about distance on:

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2 years ago
Y = -x + 2 3x + 3y - 6​
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7 0
3 years ago
Read 2 more answers
Simplify expression (-9)
Anarel [89]

Answer:

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Step-by-step explanation:

5 0
3 years ago
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Solve the system of equations. 5x y = 9 3x 2y = 4 (−2, 5) (1, 4) (2, −1) (4, −4)
kobusy [5.1K]

The solution of the system of equations that is given is (2,-1).

Given a system of equations are 5x+y=9 and 3x+2y=4.

A system of linear equations (or linear system) is a collection of one or more linear equations involving the same variables.  A solution to a linear system is an assignment of values to the variables such that all the equations are simultaneously satisfied.

The given equations are

5x+y=9    ......(1)

3x+2y=4  ......(2)

Here, the substitution method is used to solve the system of equations.

Find the value of y from equation (1) by subtracting 5x from both sides.

5x+y-5x=9-5x

y=9-5x

To find the value of x substitute the value of y in equation (2).

3x+2(9-5x)=4

Apply the distributive property a(b+c)=ab+ac as

3x+2×9-2×5x=4

3x+18-10x=4

Combine the like terms on the left side as

-7x+18=4

Subtract 18 from both sides and get

-7x+18-18=4-18

-7x=-14

Divide both sides by -7 and get

(-7x)÷(-7)=(-14)÷(-7)

x=2

Substitute the value of x in equation (1) and get

5(2)+y=9

10+y=9

Subtract 10 from both sides

10+y-10=9-10

y=-1

Hence, the solution of system of equations 5x+y=9 and 3x+2y=4 is (2,-1).

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6 0
2 years ago
93. Let f(x) = 3x - 1 and g(x) = x + 5. Evaluate the following limits. (a) lim x→3 f(g(x)] (b) lim x→3 g[f(x)]​
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Answer:

a) 26. b) 13

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