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

Mathematics

1 answer:

goldenfox [79]3 years ago

7 0

Answer:

Answer is 40.

Step-by-step explanation:

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Evaluate 3x – 4 when x=7. The value of the expression is

Novay_Z [31]

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Step-by-step explanation:

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3 years ago

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Find the value of x and y so that both proportions will be correct:

andrew11 [14]

The values of x and y are 0.2 and 0.4 respectively.

<em><u>Explanation</u></em>

The given proportions are.....

$x: 1\frac{2}{3}=y: 3\frac{1}{3}$ and $y:1.5=0.2:0.75$

From the second proportion, we will get....

$y:1.5=0.2:0.75\\ \\ \frac{y}{1.5}=\frac{0.2}{0.75} \\ \\ 0.75y=0.2*1.5\\ \\ 0.75y=0.3\\ \\ y=\frac{0.3}{0.75}=0.4$

Now, we will plug this $y=0.4$ into the first proportion. So we will get....

$x: 1\frac{2}{3}=y: 3\frac{1}{3}\\ \\ x: \frac{5}{3}=0.4:\frac{10}{3} \\ \\ \frac{x}{\frac{5}{3}}= \frac{0.4}{\frac{10}{3}}\\ \\ \frac{3x}{5}=\frac{1.2}{10}\\ \\ 30x=6\\ \\ x= \frac{6}{30}=0.2$

So, the values of x and y are 0.2 and 0.4 respectively.

6 0

3 years ago

How can you find a place value in dicimals?

Verizon [17]

Well 1234567 is a number and
7 is in one's place
6 is in ten's place
5 is in hundred's place
4 is in thousand's place
3 is in ten thousand's place
2 is in thousand's place
1 is in million's place

I hope I have answered it right

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3 years ago

If you can mow 1000 square feet per minute, how long to mow a circle with diameter of 800 feet?

maria [59]

Answer:

You can calculate the area of the circle

We know the formula is: $\pi*r^2$