Mathematics High School

30. A mom bought her kids 3 cartons of milk
for $1.25 each and 6 doughnuts. The total
cost was $6.90. Write an equation to
determine the cost of a doughnut.

Answers

Answer 1

Answer:

x = (1.25 * 3 - 6.90) divided by 6

Step-by-step explanation:

this will get the price of all the milk, then take it out of the total price, then divide it by 6 because there are 6 donuts, this will give you the price of 1 donut

Answer 2

Answer:

$3.15

Step-by-step explanation:

$1.25x3=$3.75

$6.90-$3.75=$3.15

Related Questions

The average temperature in the North Pole in the summer is 32 degrees F. The average temperature in the North Pole in the winter is -40 degrees F.

Kevin says that the difference between these two temperatures is 8 degrees.

Identify the error in Kevin's thinking. Determine the difference between these two temperatures, and explain or show your process.

Answers

Answer:

he counted from 32 to 40 , and not to -40

Step-by-step explanation:

the difference is 72 degrees

Which solids have the same types of vertical cross sections through the base?
a rectangular prism and a cylinder
a rectangular prism and a cone
a cylinder and a cone
a cylinder and a pyramid​

Answers

Answer:

a rectangular prism and cylinder.

Answer:

Its   A) a rectangular prism and a cylinder on edge

Step-by-step explanation:

Ben made a sundial in his backyard by placing a stick with height 6 in. straight into the ground, and marking the hours in the grass. To test it, he checks the time each day when the sun makes an angle of 30° or 60° with the ground. Select all the possible lengths of the shadow when Ben checks the sundial.
A. 12 in.
B. 23√ in.
C. 8 in.
D. 63√ in.
E. 22√ in.

Answers

Answer:

B and D

Step-by-step explanation:

What is the volume of a cylinder with a radius of 4 yards and a height of 6 yards

Answers

Answer: 230. 58 m^3


Explanation: V=πr2h=π·3.662·5.49≈230.58431


Hope this is right

Answer:

301.59 yards

Step-by-step explanation:

please send help, and explain if you can <333

Answers

Answer:

it would be B

Step-by-step explanation:

d=(0-(-5)^2+(-2-(-3)^2

d=(5)^2+(1)^2

d=25+1

d=26

(2t2 - 36t + 162). - (t-9)

Answers

Answer:

2t^2 - 37t + 171

Step-by-step explanation:

distrube the - to the (t-9) and then combine like terms

Answer:(2t2 +  27t) -  162  = 0  

STEP

2

:

Trying to factor by splitting the middle term

2.1     Factoring  2t2+27t-162  

The first term is,  2t2  its coefficient is  2 .

The middle term is,  +27t  its coefficient is  27 .

The last term, "the constant", is  -162  

Step-1 : Multiply the coefficient of the first term by the constant   2 • -162 = -324  

Step-2 : Find two factors of  -324  whose sum equals the coefficient of the middle term, which is   27 .

     -324    +    1    =    -323  

     -162    +    2    =    -160  

     -108    +    3    =    -105  

     -81    +    4    =    -77  

     -54    +    6    =    -48  

     -36    +    9    =    -27  

     -27    +    12    =    -15  

     -18    +    18    =    0  

     -12    +    27    =    15  

     -9    +    36    =    27    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -9  and  36  

                    2t2 - 9t + 36t - 162

Step-4 : Add up the first 2 terms, pulling out like factors :

                   t • (2t-9)

             Add up the last 2 terms, pulling out common factors :

                   18 • (2t-9)

Step-5 : Add up the four terms of step 4 :

                   (t+18)  •  (2t-9)

            Which is the desired factorization

Equation at the end of step

2

:

 (2t - 9) • (t + 18)  = 0  

STEP

3

:

Theory - Roots of a product

3.1    A product of several terms equals zero.  

When a product of two or more terms equals zero, then at least one of the terms must be zero.  

We shall now solve each term = 0 separately  

In other words, we are going to solve as many equations as there are terms in the product  

Any solution of term = 0 solves product = 0 as well.

Solving a Single Variable Equation:

Step-by-step explanation:

Find the slopes form two points (-1, -2) and (3,-4)

Answers

4/6 or 2/3. Take x2 subtract it by x1. Then take y2 and subtract y1. Take the number you got from the x coordinate over the number you got from the y coordinate

Answer:

m=-1/2

Step-by-step explanation:

use y=mx+b

help me asap mathematics 7th grade

Answers

Answer:

The pizza is 8.99 per pizza.

Step-by-step explanation:

What does it mean to SOLVE a system of linear equations?

Answers

Answer:

In solving a system of linear equations, we try to find values for each of the unknowns that will satisfy every equation in the system

Step-by-step explanation:

PLEASE HELP ITS TIMED!!!
Order from least to greatest -1/2, -3/4, -2/5

Answers

Answer:

-2/5, -1/2, -3/4

Step-by-step explanation:

You have to have the same denominator.

-10/20, -15/20, -8/20

Hope this helps!

what is 892.42 rounded tents place

Answers

892.4

May Nilbin Be With You

Solve the system of equations
Y = 2x
X - Y = 10


Answers

Answer:

x=-10, y=-20

Step-by-step explanation:

first you substiture the y in the second equation with the first

x-2x=10

then solve

1x-2x=-1

-x=10

multiply both sides by a negative to make the varible a

positive

x=-10

now we substitue the x in the first equation with -10

y=2(-10)

y=-20

Find the slope of the line passing through the pair of given points.
(5, 7) and (2,7)

Answers

Answer:

m = 0

Step-by-step explanation:

[tex]m = \frac{7 - 7}{5 -2} \\m = \frac{0}{3}\\m = 0[/tex]

Which answer describes the type of sequence?
1, 6, 7, 13, ...
geometric
O arithmetic
neither arithmetic nor geometriC

Answers

I think the answer is arithmetic.
I hope this helps! Be safe out there.
Sorry if I’m wrong

Answer:

neither arithmetic nor geometric

Step-by-step explanation

I got it wrong and assuming they don't have a common ratio/ constant difference  

Jackson invested $750 into a savings bond that earned 3% interest each month. At the same time, he also began saving money in a savings account. The value of the savings account is represented by f(x) = 1,000 + 25x, where x represents the number of months since the account was opened. At the end of how many months did the value of the savings bond first begin to exceed the value of the savings account?

Answers

Answer:

33 Is the ANSWER

36= W/4 what does w equal ???????????///

Answers

Answer:

W=144

Step-by-step explanation:

36=w/4

36 times 4=w/4 times 4

144=W

Answer:

144

Step-by-step explanation:

144/4=36 36x4=144

Brainliest to 1st person to get both correct!

Answers

Not sure for the first one but I think the second one is BD

Plssss helpppp!!!!!!!

Answers

Answer:

Subtract 6 from both sides so the equation equals 0 ;)

Step-by-step explanation:

Answer:

Subtract 6 from both sides!

Step-by-step explanation:

I got it wrong at first 0-0

If you combine 4x and -2x how many x's will we have left?​

Answers

Answer:

Step-by-step explanation:

4x+(-2x)=2x

is the relation a function (0, 3), (4, 0), (8, 0), (4, -3), (-5, 8) ​

Answers

Answer:

hlo guys Gavin magnus here

In a class, the ratio of girls : boys is 5:3.

What fraction of the class are boys?

please answer urgent , high points up for grabs , please give good explanation

Answers

you add the 5+3 to get the overall amount of 8 parts, 3 of them parts are boys so the answer is 3/8


A quart of milk costs $1.89. What is the total cost for 20 quarts of milk?

Answers

To do this problem, you have to multiply the number of one quart of milk by twenty to get the total cost. So, you would do 1.89 x 20, which equals 37.8. So, the total cost would be $37.80 :)

Write the equation of the line given a slope of 0 through the point (5, -7)

Answers

a line with a slope of 0 is a horizontal line
so the equation would be y=-7

Answer:

y=-7x+5

Step-by-step explanation:

The number of fish in a lake decreased by 25% between last year and this year. Last year there were 60 fish in
the lake. What is the population this year? If you get stuck, consider drawing a diagram.
There are
fish in the pond.
HELLPPP

Answers

Answer:

theres

4

Step-by-step explanation:

What are two equivalent fractions for 4/12??

Answers

1/3, 8/24

u can just multiply/divide the numerator and the denominators by the same number (if its divisible without making a complex fraction.)

Answer:

g

Step-by-step explanation:

g

3x - 4 1/2 = -19 1/2

Answers

3x- 9/2= -39/2
3x= -39/2 + 9/2
3x= -30/2
3x= -15
x= -15/3
x=-5
-5, you can remove 1/2 from both sides, then add 4 to both sides, you’ll have 3x=-15

PLEASE HELP!!!!!!!!!!

Answers

Answer:

y+1 1/4=3 3/4 or y.1 1/4=3 3/4

Step-by-step explanation:

i need help with my math problems

Answers

Answer:

Step-by-step explanation:

X       Y                    X           Y    

0       3                     0           5

1        7                     1              8

2        11                    2           11

3        15                   3          14

4         19                   4            17  

NEEEEEEDD HELLLLPPP ASAPPPP

Answers

What do ya got? I need the equation and a little explanation of what needs to be done.

A small submarine travels at a speed of 2.4 hours how far will the submarine travel in 0.25 hours

Answers

Answer:

If the math adds up the submarine will travel 6 km in 25 hours

Step-by-step explanation:

i think u pretty much just multiply :)

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