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kenny6666 [7]
3 years ago
11

A letter that represents an unknown number is a(n)

Mathematics
1 answer:
marishachu [46]3 years ago
5 0
A variable represents an unknown number
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What number is between 0 and 1/3
antiseptic1488 [7]
1/6 should be the correct answer
7 0
3 years ago
Using 4 equal-width intervals, show that the trapezoidal rule is the average of the upper and lower sum estimates for the integr
prisoha [69]

Split up the interval [0, 2] into 4 subintervals, so that

[0,2]=\left[0,\dfrac12\right]\cup\left[\dfrac12,1\right]\cup\left[1,\dfrac32\right]\cup\left[\dfrac32,2\right]

Each subinterval has width \dfrac{2-0}4=\dfrac12. The area of the trapezoid constructed on each subinterval is \dfrac{f(x_i)+f(x_{i+1})}4, i.e. the average of the values of x^2 at both endpoints of the subinterval times 1/2 over each subinterval [x_i,x_{i+1}].

So,

\displaystyle\int_0^2x^2\,\mathrm dx\approx\dfrac{0^2+\left(\frac12\right)^2}4+\dfrac{\left(\frac12\right)^2+1^2}4+\dfrac{1^2+\left(\frac32\right)^2}4+\dfrac{\left(\frac32\right)^2+2^2}4

=\displaystyle\sum_{i=1}^4\frac{\left(\frac{i-1}2\right)^2+\left(\frac i2\right)^2}4=\frac{11}4

4 0
3 years ago
What is –96 ÷ +3? im a little confused when it comes to math
muminat

Answer:

I think the answer is -32.

Step-by-step explanation:

I'm not sure.

3 0
3 years ago
Read 2 more answers
Divide 1.20m in the ratio 2:3:4 what's the answer
Vikki [24]
2 :3 :4 gives 9 shares  (2 + 3 + 4)

9 shares = 120cm
1 share = 120/9 cm = 13 1/3 cm  ( or 13.333)

2 shares = 26 2/3 cm
3 shares = 40 cm
4 shares = 53 1/3 cm
3 0
3 years ago
Jillian burns 187 calories when she runs 2 miles. How many miles will she
dedylja [7]

Answer:

I think jillian will have to run 10 miles

Step-by-step explanation:

2 miles = 100 calories

in order to burn 500 calories

2 miles = 100 calories burned

4 miles = 200 calories burned

6 miles = 300 calories burned

8 miles  = 400 calories burned

10 miles = 500 calories burned

7 0
3 years ago
Read 2 more answers
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