All categories

3 years ago

Plz help illl give you brainslist

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

8 0

1) 8
2) 14.5*2=29
3) 7x+5=2*13, 7x+5=26, 7x=21, x=3
4)d(1)=2r,
if r increase 3 times, d(2)=2*(3r)
d(2)/d(1)=(2*3r)/2r=3,
so diameter increases 3 times

Nuetrik [128]3 years ago

8 0

1. each point on star has a radius, line extending through from the center to outer edge of the circle. 8 radii

2. diameter is twice the radius. 2 * 14.5 = 29

3. diameter is 2 * 13 = 26
26 = 7x + 5
26 - 5 = 7x
21 = 7x
3 = x

4. diameter, d = 2r
increased 3 times is multiplication.
d = 2(3r)
diameter is also increased 3 times

5. The developers can run a series of tape from the edge of the circle path to the other side directly across. Several lines of tape across the diameter.. like the star in question 1. The center is where the lines of tape cross each other.

You might be interested in

one number is equal to the square of another. find the numbers if both are positive and their sum is 1122

statuscvo [17]

Answer:

One number is 561

The other number is 23.6854

Step-by-step explanation:

x = y^2 One number = the square of another

x + y^2 = 1122 The sum of the two numbers is 1122

Substitute y^2 in for x on the second equation.

y^2 + y^2 = 1122 Combine like terms on the left

2y^2 = 1122 Divide by 2

y^2 = 1122/2

y^2 = 561 Take the square root of both sides.

y = 23.6854

x = y^2

x = 561

y^2 = 561

4 0

3 years ago

Need help asap pllzzz will give brainliest

Greeley [361]

Answer:

d. $350.00

Step-by-step explanation:

A constant is a number that does not have any variables. The additional cost would depend on the number of persons at attendance so the cost would be $10.00p which is not the constant here. Thus, $350.00 is the only constant in this situation.

4 0

3 years ago

Of all customers purchasing automatic garage-door openers, 70% purchase a chain-driven model. Let X = the number among the next

otez555 [7]

Answer:

P(X > 10), n = 15, p = 0.7

P(X > 10) =P(10 < X ≤ 15) = P(11 ≤ X ≤ 15) = P(X = 11, 12, 13, 14, 15)

=P(X = 11) + P(X =12) + P(X = 13) + P(X =14) + P(X = 15) (because these are disjoint events)

Step-by-step explanation:

See attached image for detailed explanation

7 0

3 years ago

A plane intersects a triangular prism perpendicular to its bases.What 2-D cross section is formed

Andru [333]

B. triangle is formed.

3 0

3 years ago

Read 2 more answers

g The downtime per day for a computing facility has mean 4 hours and standard deviation 0.9 hour. What assumptions must be true

Sedaia [141]

Answer:

To obtain a valid approximation for probabilities about the average daily downtime, either the underlying distribution(of the downtime per day for a computing facility) must be normal, or the sample size must be of 30 or more.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$

In this question:

7 0

3 years ago