John has a jar filled with 150 coins made up of quarters and nickels. the total value of coins is $26.70. how many quarters and how many nickels are in the jar?

Let n be the number of nickels and q be the number of quarters in the jar.

Worth of each nickle is $0.05 and worth of each quarter is $0.25. So worth of n nickles will be 0.05n and worth of q quarters will be 0.25q.

There are 150 total coins in the jar. So we can write the equation as:

n + q = 150 (Equation 1)

Total value of coins is $26.70. So we can write the equation as:

0.05n + 0.25q = 26.70 (Equation 2)

From Equation 1 value of n comes out to be n = 150 - q. Using this value in Equation 2, we get:

Using the value of q in Equation 1, we get the value of n to be 54.

This means, John has 54 nickles and 96 quarters in the jar.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

is there any photos or whatever?