Evaluate the expression: |8| - 2 x |-3| + 4

22
10
42
6

Answer:

130+8n

Step-by-step explanation:

We know that all four humidifiers cost $520 to buy at first. So, we divide that by four to get the cost of one humidifer. $130.

We know that it costs $32 a week to keep all four humidifiers maintained. So, we divide that by four to get the cost of keeping one humidifier maintained. $8 per week.

130+8n is the equation that represents the cost of buying and maintaining one humidifier.

Answer:

27 units^2

Step-by-step explanation:

The total surface area is calculated by adding all the areas on the surface: the areas of the base, top, and lateral surfaces (sides) of the object. This is done using different area formulas and measured in square units. Volume is the amount of space that a three dimensional object takes up.

So you add, next time you get another question like this

Hope this helps!

y - -2x - 6 (1)
y = x+15 (2)

From (2) we get x = y-15
We put that in (1) and we get -2(y-15)-6 = y
-2y+30-6 = y
-2y+24=y
-2y+24-y=0
-3y+24 = 0 ==> -3y = -24 ==> y = 8

We put that value in (2) and we get x = 8-15 = -7

Now in order to verify this, we replace the variables and see if (1) = (2)

y = -2x - 6 ==> (-2 * -7) - 6 = 14-6 = 8 (1')
y = x + 15 = -7 + 15 = 8 (2')

(1') = (2') ==> the solution is x = -7 and y = 8

Answer:

x=−2y=2

Step-by-step explanation:

Take the value of x from the first equation:x=2−2y (1)and substitute for x into the second:y=2(2−2y)+6

solve for y ;y=4−4y+6y=105=2

Substitute back into

(1) and find :x=2−4=−2

Answer:

A - 8x=4

B - 6x+29

Step-by-step explanation:

I hope this helps

Anwser:

Area = 20 units²

Step-by-step explanation:

hope this helps

Answer:

20 square units

Correct Answer 100%. Pls, give me brainliest. Thank You.

Answer:

C

Step-by-step explanation:

Their are 3 chances that it will happen. So it would be 3/36

Answer:

ABD = 140
DBC = 40

Step-by-step explanation:

What is shown is a supplementary angle. These types of angles equal 180 degrees.

So that means whatever angle measures is in the supplementary angle added together would equal 180.

The equation to solve this would be (15x - 4) + (5x - 8) = 180

First, I would combine like terms. The 15x and 5x can be combined together to make 20x and the -4 and -8 would be equal to -12.

The simplified equation is now 20x - 12 = 180.

Next, we need to get rid of the 12. So we add 12 to both sides.

(20x - 12) + 12 leaves 20x by itself

180 + 12 = 192

Our equation is now 20x = 192

Next, we have to make sure that the x is by itself. To do this, we have to divide each side by 20.

20x/20 leaves us with just x.

192/20 is 9.6

x is equal to 9.6

Finally, we plug in the variable's value back into the angle measures to find their value.

15(9.6) - 4 = 140

5(9.6) - 8 = 40

Therefore, ABD is 140 degrees and angle DBC is 40 degrees.

Checking our work:

To check if our work is right, we can add up the angle measures to see if it's equal to 180.

140 + 40 is 180, so we are correct.

I apologize if that was a lot to read, but I hope you understand!

Step-by-step explanation:

4. 3x+7=37, 3x=37-7=30 x=30÷3=10

5. 31=7x-11, 7x=31+11=42 x=42÷7=6

6. 11k-84=92, 11k=92+84=176 k=176÷11=16

7. 4r+13=57, 4r=57-13=44 r=44÷4=11

8. z÷4+16=21, z÷4=21-16=5 z=5×4=20

9. 7=t÷6-3, t÷6=7+3=10 t=10×6=60

Answer:

8

Step-by-step explanation:

2 1-yard long pieces of pipe would basically equal to 2 yards. so divide 2 by 1/4 which equals 8... so 8 pieces of 1/4-yard pieces of pipe would fit into 2 1-yard pieces of pipe

hope u understand :))

Answer:

x=48

y=96

z=36

Step-by-step explanation:

6.4n+3.2n+2.4n=180

n=15

x=3.2(15)=48

y=6.4(15)=96

z=2.4(15)=36

Answer:

11

Step-by-step explanation:

Corresponding angles are equal so-

6x+1=10x-43

6x-10x=-43-1

-4x=-44

x=11

Hope it helps! :)

Answer:

1/3

Step-by-step explanation:

I'm not sure but you get 4/12 you simplify and get 2/6 and you simplify again and get 1/3

Answer:

The answer is 1/4

Step-by-step explanation:

i did the quiz

Answer: There will be 16,777,216 bacteria by the end of the day.

Step-by-step explanation: This situation can be represented by a geometric sequence, in which the quotient of consecutive terms is always the same, called the common ratio.

The nth term of a geometric sequence is:

In which is the term at the initial moment and q is the common ratio.

-------------------

Initially, 1 bacteria, which means that

Double every hour, thus,

After n hours, the number of bacteria will be given by:

-------------------

By the end of the day, that is, 24 hours, the amount will be:

There will be 16,777,216 bacteria by the end of the day.

A similar question is given at brainly.com/question/23826475

Answer:

1310

Step-by-step explanation:

Because, you have to add the biggest number which is 380, to the second to biggest number which is 360, which will both get you to 740. Then you have to add the 740 to 300 which both gives you 1040 and then last but not least you have to add, 1040 and 270 together which will give you 1310 and that's your answer. :)

Answer:

z=28

Step-by-step explanation:

6=1/4z-1

1) take the -1 over to the other side of the equation, so it becomes +1

2) 6+1=7, so your new equation is 7=1/4z

3) to get "z" on its own, you'll have to time the 7 by 4 which is 28

4) your equation is now 28=z and that is your answer.

You can check by inserting 28 instead of z into the equation and it gives you 6. E.G. 1.4 X 28 -1 =6

The valley in California has an elevation of feet "below sea level".
Below sea level means below 0 feet, so it'd have -5 feet

The one in Arizona would be lower than it, so the elevation will definitely be -9 feet

Answer: ~801.45

Step-by-step explanation: A=ah+bh+ch+1

2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=16·15+10·15+17·15+1

2·﹣164+2·(16·10)2+2·(16·17)2﹣104+2·(10·17)2﹣174≈801.45367

The results of the 100 rolls with the number cube are such that the probability of rolling a 2 is 32%.

This refers to the chances that the number cube rolls a 2 when thrown.

This can be found by the formula:

= Number of times 2 was rolled / Total number of times number cube was rolled

Solving gives:
= 32 / 100

= 32%

Find out more on probability at https://brainly.com/question/25856001.

#SPJ1

Answer:

Median= 10

Step-by-step explanation:

3,5,9,11,19,21

To find the median you put the number in order from least to greatest and then, you cross one off from both sides until you get to the middle.

9+11=20

20/2=10

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[tex]\blue\textsf{\textbf{\underline{\underline{Question:-}}}}[/tex]

What is the surface area of the cylinder with height 2 yd and radius 7 yd?

[tex]\blue\textsf{\textbf{\underline{\underline{Answer and how to Solve:-}}}}[/tex]

[tex]\textsf{Formula for Surface Area (SA) of a Cylinder:-}[/tex]

[tex]\dashrightarrow\bigstar{\boxed{\bf{A=2\pi rh+2\pi r^2}}}\dashleftarrow[/tex]

Where

[tex]\bold{A=Area}[/tex]

[tex]\bf{\pi =pi (3.14...)}[/tex]

[tex]\bold{r=radius}[/tex]

[tex]\bold{h=height}[/tex]

Given:-

[tex]\bold{r=7}[/tex]

[tex]\bold{h=2}[/tex]

Solving for S.A.:-

[tex]\bold{SA=2\pi (7)(2)+2\pi (7)^2}[/tex]

[tex]\bold{SA=2\pi (14)+2\pi (49)}[/tex]

On further simplification,

[tex]\bold{SA=28\pi +98\pi }[/tex]

[tex]\bold{SA=126\pi }[/tex]

And finally,

[tex]\dashrightarrow\bigstar\boxed{\bold{SA=395.841\:yd}}\dashleftarrow[/tex]

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Answer:

954.814

Step-by-step explanation:

Answer:

16.8 for number c Michael will earn 16.8$