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3 years ago

what is the unit price of 16 and 12.29, 32 and 19.98, and 128 and 34.99 (it would be really helpful to know thanks) show work

Mathematics

1 answer:

SpyIntel [72]3 years ago

3 0

Answer:

The unit costs are $0.77, $0.62 and $0.27 respectively.

Step-by-step explanation:

The unit price is simply the cost of the items divided by the amount of the items that are included. So, just take the cost and divide it.

$12.29/16 = $0.77 per unit

$19.98/32 = $0.62 per unit

$34.99/128 = $0.27 per unit

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PLEASE HEPP IM STUCK

Ann [662]

Answer:

m = -4

Step-by-step explanation:

We are given that a line intersects the points (-2, 9) and (3, -11).

We want to write the slope of this line.

The slope (m) can be found using the formula $\frac{y_2-y_1}{x_2-x_1}$ , where $(x_1, y_1)$ and $(x_2, y_2)$ are points.

Even though we have everything we need to calculate the slope, let's label the values of the points to avoid any confusion & mistakes.

$x_1=-2\\y_1=9\\x_2=3\\y_2=-11$

Now substitute these values into the formula (remember that the formula has subtraction).

m= $\frac{y_2-y_1}{x_2-x_1}$

m= $\frac{-11-9}{3--2}$

Simplify.

m= $\frac{-11-9}{3+2}$

Subtract the values on top.

m= $\frac{-20}{3+2}$

Now add the values on the bottom together.

m= $\frac{-20}{5}$

Now divide -20 by 5.

m = -4

8 0

1 year ago

An animal shelter has 36 pets available for adoption. 1/4 of them are puppies. How many are puppies?

FromTheMoon [43]

The answer is 9

Explanation: 1/4 of 36= 9

3 0

2 years ago

Wich equation can help you estimate the difference of 63,412 and 31,500

Harrizon [31]

Answer:

63000- 32000

Step-by-step explanation:

its 400 so it rounds down and 500 rounds up

4 0

3 years ago

Mr. Akika has 30 24-cent and 33-cent stamps all told. The stamps are worth $8.91. How many of each kind of stamp does he have?

riadik2000 [5.3K]

Answer:

24-cent: 11
33-cent: 19

Step-by-step explanation:

I find it easiest to solve these using the variable to represent the number of the most-expensive item. Let x represent the number of 33-cent stamps. Then the total value (in cents) is ...

33x +24(30 -x) = 891

9x = 171 . . . . . . . . . . . . . subtract 24(30), collect terms

x = 19 . . . . . . . . . . . . divide by 9

30-x = 11 . . . . . . . find the number of 24-cent stamps

Mr. Akika had 11 24-cent stamps and 19 33-cent stamps.

_____

Additional comment

You seem to have several of these to solve. They all have a similar solution.

If we let x represent the number of higher-value items, N, the total number of items, V the total value, and v1 and v2 the individual values (v2 > v1), the equation is ...

v2(x) +v1(N -x) = V

x(v2 -v1) = V -v1·N

x = (V -v1·N)/(v2 -v1) . . . . generic solution

Using this formula in the problem here, we find ...

x = (891 -24(30))/(33 -24) = 171/9 = 19 . . . as above

7 0

2 years ago

Three times the difference of a number and seven is negative three. Fi nd the number.

postnew [5]

3(x-7)=-3
3x-21=-3
3x=18
x=6

6 0

3 years ago