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3 years ago

2/5*-3=7+9/10x what does X=?

Mathematics

2 answers:

baherus [9]3 years ago

5 0

Answer:x=−

82-

Step-by-step explanation:

Andrews [41]3 years ago

4 0

<h2>Answer:</h2><h2>x = - 20</h2><h2 /><h2>Hope this helps!!</h2>

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If f(x) = 5x2 − 2x, 0 ≤ x ≤ 3, evaluate the Riemann sum with n = 6, taking the sample points to be right endpoints. R6 =

Leona [35]

Answer:

46.375

Step-by-step explanation:

Given information:

$f(x)=5x^2-2x$

where, 0 ≤ x ≤ 3.

We need to divde the interval [0,3] in 6 equal parts.

The length of each sub interval is

$\dfrac{b-a}{n}=\dfrac{3-0}{6}=0.5$

Right end points are 0.5, 1, 1.5, 2, 2.5, 3.

The value function on each right end point are

$f(0.5)=5(0.5)^2-2(0.5)=0.25$

$f(1)=5(1)^2-2(1)=3$

$f(1.5)=5(1.5)^2-2(1.5)=8.25$

$f(2)=5(2)^2-2(2)=16$

$f(2.5)=5(2.5)^2-2(2.5)=26.25$

$f(3)=5(3)^2-2(3)=39$

Riemann sum:

$\sum_{n=1}^6 f(x_n)\Delta x_n$

$Sum=[f(0.5)+f(1)+f(1.5)+f(2)+f(2.5)+f(3)]\times 0.5$

$Sum=[0.25+3+8.25+16+26.25+39]\times 0.5$

$Sum=92.75\times 0.5$

$Sum=46.375$

Therefore, the Riemann sum with n = 6 is 46.375.

6 0

3 years ago

The rectangle below has an area of x^2+11x+28 square meters and a length of x+7meters. What expression represents the width of t

zvonat [6]

Report the guy who put that first answer he trying to get your ip

4 0

3 years ago

PLEASE HELP!!!

Oksanka [162]

Answer:

PLEASE HELP!!!

1. Under what conditions must we assume a Student t distribution for the sampling distribution of sample means when testing a claim about a population mean?

2. Give one difference between the Student t distribution and the normal distribution.

3. Which TI-84 calculator command or StatCrunch dialog box is used to find the P-value given a t test statistic?

Step-by-step explanation:

PLEASE HELP!!!

1. Under what conditions must we assume a Student t distribution for the sampling distribution of sample means when testing a claim about a population mean?

2. Give one difference between the Student t distribution and the normal distribution.

3. Which TI-84 calculator command or StatCrunch dialog box is used to find the P-value given a t test statistic?

4 0

3 years ago

Y’all help meeee imma fail fr!!.!.

sweet [91]

Answer:

Altitude of cylinder = 10 cm

Step-by-step explanation:

Given:

lateral surface area of cylinder = 90 cm²

Circumference of base = 9 cm

Find:

Altitude of cylinder

Computation:

Circumference of base = Circumference of cylinder

So,

2πr = 9

lateral surface area of cylinder = 2πrh

2πrh = 90

We know that; 2πr = 9

So,

9(h) = 90

h = 90 / 9

Altitude of cylinder = 10 cm

7 0

3 years ago

3.5 m

marysya [2.9K]

Answer:

This question seems to be incomplete, I guess that we have a circular pool, with a diameter of 3.5 m.

Now, the circunference of a circle can be written as:

C = 2*pi*r

where:

pi = 3.14

r = radius = half of the diameter = 3.5m/2 = 1.75m

Then replacing those values in the equation for the circumference we have:

C = 2*3.14*1.75m = 10.99 m.

And knowing that the value of pi is actually larger than 3.14 (pi = 3.1415926535....)

We can safely round up the circumference to the next whole number, C = 11m

4 0

3 years ago