4 years ago

The value of the function f(x) = 3x squared minus 2x for x =4

Mathematics

1 answer:

goldenfox [79]4 years ago

7 0

Answer:

Answer is 40.

Step-by-step explanation:

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A recent poll in your state shows that 25% of the vehicles are SUV’s and 10% are trucks. The pill counted 5 million SUV’s. How m

Dovator [93]

Answer:

20 million vehicles in total

Step-by-step explanation:

25%=1/4

5 million vehicles = 25%

100%/25%=4

5 million * 4 = 20 million vehicles in total

3 0

3 years ago

Find the value of x.

Gala2k [10]

Answer:

$\large\boxed{2\sqrt7}$

Step-by-step explanation:

Look at the picture.

ΔADC and ΔACB are similar. Therefore the corresponding sides are in proportion:

$\dfrac{AC}{AD}=\dfrac{AB}{AC}$

We have

$AC=x,\ AD=2,\ AB=2+12=14$

Substitute:

$\dfrac{x}{2}=\dfrac{14}{x}$ <em>cross multiply</em>

$x^2=(2)(14)\\\\x^2=28\to x=\sqrt{28}\\\\x=\sqrt{4\cdot7}\\\\x=\sqrt4\cdot\sqrt7\\\\x=2\sqrt7$

5 0

4 years ago

The dimensions of a rectangle can be given by x+9 and x-2. If the area is 60ft^2, what is the value of X?

Veronika [31]

Answer:

Step-by-step explanation:

(x + 9) * (x - 2) = 60

x^2 - 2x + 9x - 18 = 60

x^2 + 7x - 18 = 60

x^2 + 7x = 78

FACTORING:

x(x + 7) = 78

x = 6

6 0

3 years ago

A savings account starts with $181.25. After 7 years of continuous compounding at an interest rate, r, the account has $1450.

Nataliya [291]

Uh round up until higher

4 0

3 years ago

X + y = -9<br> x+ 2y = -25<br> What is the value of x??

sineoko [7]

Answer:

x= 7 y= -16

Step-by-step explanation:

plug it into the equation and it match's.

4 0

4 years ago