I need help i am taking a test i need help

A road crew much repave a road that is 4/5 miles long. They can repave 1/20 miles each hour. How long will it take the crew to r

lutik1710 [3]

Answer:

16 hours

Step-by-step explanation:

Multiply the 4/5 by 4 to get the denominator as 20. So you do 4 x 4 which equals 16 and 5 x 4 which equals 20 so you get 16/20 miles or 16 hours.

3 0

3 years ago

ISTEP IS COMING UP AND IM NOT READY!!!

AlekseyPX

> and < with the lines under it mean that they can also be equal to the constant on the other side (greater/less than or equal to)

So x <= 3 can be anything less than 3 and 3.

*the = in this inequality is the equivalent of a line

Now vice versa.

x => 3 can be anything greater than 3 and 3.

Now for the dots.

The open dots in signs are (< and >).

Basically they start at that point they are on but don't include it.

So an open dot at 3 pointing to the left means that the value is greater than 3 but does not include 3.

The closed dots in signs are (<= and =>).

They start at the point and include it.

So a closed dot a 3 pointing to the left means that the value is greater than 3 and includes 3.

Arrows.

Arrows pointing to the left mean that the values are getting bigger.

Arrows pointing to the right mean that the values are getting smaller.

ie : An arrow pointing to the left with a starting point at 3 = 3 and anything bigger, such as 4.

ie : An arrow pointing to the right with a starting point at 3 = 3 and anything smaller, such as 2.

Solve for problems.

The main concept is isolate the variable.

This basically means make the variable be lonely ^^

Use +, -, *, and /

Ex : 6x + 2 > 3

First, we would subtract 2 from both sides.

6x > 1

Then, we would divide each side by 6, leaving the x alone.

x > 1/6

And voila! x is anything greater than 1/6 but it does not include 1/6.

Hope this helps! ^^

8 0

3 years ago

Read 2 more answers

Suppose that the demand equation for a certain item is 1p+1x2−160=0. evaluate the elasticity at 65:

bekas [8.4K]

Price elasticity is defined as $\frac{\Delta(quantity)}{\Delta(price)}$ .

Here, the question has omitted to define variables, so we will ASSUME
p=price
x=variable,
and we're given
p+x^2-160=0

We calculate
$\delta{x}/\delta{p}$ by implicit differentiation with respect to p:
1+2x (dx/dp)=0
=>
E(x)=(dx/dp)=-1/(2x)

Therefore the price elasticity at x=65 is
E(65)=1/(2*65) =-1/130 (approximately -0.00769)

4 0

3 years ago

How do you convert to radians

Elanso [62]

If x is an which of the following statements adds 5 to the current value of x and stores the new value back in x?If x is an int, which of the following statements adds 5 to the current value

6 0

3 years ago

Read 2 more answers

Show that from any subset of 51 numbers taken from {1, 2, 3, ..., 100}, there exists a pair of elements such that one divides an

Sunny_sXe [5.5K]

Consider the 50 odd numbers 1,3, 5, ..., 99.

For each one, form a box containing the number and all powers of 2 times

the number.

So the first box contains {1,2,4,8, 16,..}

the next box contains {3,6,12,24,48, ...}

Then among the 51 numbers chosen, the pigeonhole principle tells us that there are two that are contained in the same box. They must be of the form $2^{m} k$ and $2^{n} k$ with the same odd number k. So one will divide the other.

<h3>What is pigeonhole principle?</h3>

According to the pigeonhole principle, if n items are placed in m containers, with n > m, at least one container must contain more than one item.

For example, if you have three gloves (and none of them are ambidextrous/reversible), you must have at least two right-handed gloves or at least two left-handed gloves, because there are three objects but only two categories of handedness to put them into.

To learn more about pigeonhole principle from the given link

brainly.com/question/13982786

#SPJ4

4 0

1 year ago