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viktelen [127]
3 years ago
7

What is -3(4x-2)-2x ?

Mathematics
1 answer:
Margarita [4]3 years ago
7 0

Step-by-step explanation:

- 3(4x - 2) - 2x \\  \\  =  - 12x + 6 - 2x \\  \\  =  - 14x + 6

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Recall that Rn denotes the right-endpoint approximation using n rectangles, Ln denotes the left-endpoint approximation using n r
pogonyaev

Answer:

R_5=1.12

Step-by-step explanation:

We want to calculate the right-endpoint approximation (the right Riemann sum) for the function:

f(x)=x^2+x

On the interval [-1, 1] using five equal rectangles.

Find the width of each rectangle:

\displaystyle \Delta x=\frac{1-(-1)}{5}=\frac{2}{5}

List the <em>x-</em>coordinates starting with -1 and ending with 1 with increments of 2/5:

-1, -3/5, -1/5, 1/5, 3/5, 1.

Since we are find the right-hand approximation, we use the five coordinates on the right.

Evaluate the function for each value. This is shown in the table below.

Each area of each rectangle is its area (the <em>y-</em>value) times its width, which is a constant 2/5. Hence, the approximation for the area under the curve of the function <em>f(x)</em> over the interval [-1, 1] using five equal rectangles is:

\displaystyle R_5=\frac{2}{5}\left(-0.24+-0.16+0.24+0.96+2)= 1.12

3 0
3 years ago
One brother says of his younger brother: “Two years ago, I was three times as old as my brother was. In three years’ time, I wil
aleksklad [387]

Answer:

17

Step-by-step explanation:

Let us suppose two years ago my brother's age was x years

Then, my age was 3x

Three years from now, my brother's age will be (x +2+3) = (x+5) years

And my age will be (3x+2+3) = (3x+5) years

But it is given that i will be twice as old as my brother.

So, 2(x+5)= (3x+5)

or, x= 5 years

So my brother's present age is 5+2= 7 years

And my age is 5*3+2= 17 years

5 0
3 years ago
Read 2 more answers
Help please I’m stuck
Jlenok [28]
12:4=3
9:3=3
so u multiply each side by 3 to get the second triangle..
answer: 4.5*3 =13.5
4 0
3 years ago
Read 2 more answers
Please help thank u!
ale4655 [162]

Answer:

6=65

Step-by-step explanation:

34

5 0
3 years ago
Solve the equation |t+8|=5
vodka [1.7K]

We have t+8=5 or t+8=-5

So t1 = -3 and t2 = -13

4 0
3 years ago
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