Can I please get help I need help I’ll mark you the brainliest

Answer:

justin 10+ Amy 20 + henry 40+ do answer would be 10+20+50=70

explanation

I took justin and timed it by two then half of 20 is 10 then timed it by two again which 20*2 is 40

add it all together and you get 70

Amy sent 20 messages, Justin 10 messages and Henry 40 messages in total.

These type of equation consists of equation with unknown variables.

Let the number of messages sent by amy be x

Let the number of messages sent by Justin be y

Let the number of messages sent by Henry be z

If the total number od mesages sent is 70, hence;

x + y + z = 70

If Justin sent 10 fewer messages than Amy, then;

y = x - 10

If Henry sent 2 times as many messages as Amy, then;

z= 2x

Substitute

x + x - 10 + 2x = 70

4x = 70 + 10

4x = 80

x = 20

Recall

y = x  - 10

y = 10

Also z = 2x

z = 2(20)
z = 40

Hence Amy sent 20 messages, Justin 10 messages and Henry 40 messages in total.

Learn more on system of equation here: https://brainly.com/question/13729904

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Answer:  Shannon sold the silver plated frame because 45 divided by 2.5 = $18, which is the wood frame rate.

STEP BY STEP EXPLANATION:

I know this because 45 divided by 2.5 = $18 And that’s the silver plated frame.

Answer: 24 schedules.

Step-by-step explanation:

Given data:

Courses planning to take = 4

Computer courses = 2

Courses from other areas = 2

Solution:

This problem can be solved using permutation.

For Computer science courses.

npr = n! / ( n - r )!

Where n = 4

r = 2

4p2 = 4!/( 4-2)!

= 4!/2!

= 12

For other courses.

Where n = 4

r = 2

4p2 = 4!/( 4-2)!

= 4!/2!

= 12

Jane can have a total of 24 different schedules.

Answer:

If p - q = 10, then p = 10 + q.  Replace the other p with this:

q(2(10 + q) - 10) = 3600

q(20 + 2q - 10) = 3600

q(10 + 2q) = 360

The equilibrium point of a demand and supply function is the point where both functions are equal.

The equilibrium price is 40, and the corresponding demand is 30 supplies

Given

[tex]p- q = 10[/tex] --- the supply function

[tex]q(2p - 10) = 2100[/tex] --- the demand function

Make q the subject in [tex]p- q = 10[/tex]

[tex]q = p - 10[/tex]

Substitute [tex]q = p - 10[/tex] in [tex]q(2p - 10) = 2100[/tex]

[tex](p - 10)(2p - 10) = 2100[/tex]

Factor out 2

[tex]2(p - 10)(p - 5) = 2100[/tex]

Divide both sides by 2

[tex](p - 10)(p - 5) = 1050[/tex]

Open brackets

[tex]p^2 -10p - 5p + 50 = 1050[/tex]

[tex]p^2 -10p - 5p + 50 - 1050 =0[/tex]

[tex]p^2 -15p - 1000 =0[/tex]

Expand

[tex]p^2 -40p + 25p- 1000 =0[/tex]

Factorize

[tex]p(p -40) + 25(p- 40) =0[/tex]

Factor out p - 40

[tex](p+ 25) (p- 40) =0[/tex]

Solve for p

[tex]p = -25[/tex] or [tex]p = 40[/tex]

The price cannot be negative.

So: [tex]p =40[/tex]

Recall that:

[tex]q = p - 10[/tex]

[tex]q = 40 - 10[/tex]

[tex]q = 30[/tex]

Hence, the equilibrium price is 40, and the corresponding number of supplies is 30

See attachment for the graphs of both functions

Learn more about equilibrium price and quantity at:

https://brainly.com/question/11161357

Answer:

15/2

Step-by-step explanation:

when dividing by fractions, we "flip and multiply"-- therefore:

3 ÷ 2\5 = 3 x 5/2

3 x 5/2 = 15/2

Use the rule (a^b)^(c) = a^(bc).

[5^(1/3)]^(3)

5^(1/3)(3)

5^(1)

Answer: 5

Step-by-step explanation:

a) 13=$7

x=$1

(do cross multiplication)

13=7x

x=1.86 pounds

Answer:

0.5

Step-by-step explanation:

0.68 - 0.17

0.68 ≈ 0.7

0.17 ≈ 0.2

0.7 - 0.2 = 0.5

Answer:

Step-by-step explanation:

Step one:

given

Total money at hand=$25

cost of one popcorn=n $2.5

cost of drink= $1.5

total number of friends plus you= 4+1= 5

let the total amount spent be y

y= 5(2.5)+5(1.5)

y=12.5+7.5

y=20

The above shows that $20 is enough to cover the expenses, and there will be a balance of $5

Answer:

18 units

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

Answer:

the range is 8-1=7

Step-by-step explanation:

Answer:

0.75meters

Step-by-step explanation:

25% of 3 is 0.75

Plz mark me brainliest

Answer:

Step-by-step explanation:

3x-11+6x-10+x=180

10x-21=180

10x=201

x=20,1

Answer: the answer is A

Step-by-step explanation:

Answer:

Jack has $2.20 left.

Step-by-step explanation:

We have to add 5.50 and 2.30 to find his cost.

2.30 + 5.50 = 7.80.

Then, subtract it from $10.00

10.00 - 7.80 = 2.20

Jack has $2.20 left

hope this helped!

Answer:

9 that what p stands for hope it help

Step-by-step explanation:

Answer:5.78

Step-by-step explanation: It is 5.78 bc do 40.50 divided by 7 and you will get your answer

Brainliest please???

Answer:

Each tube costs about $5.79.

Step-by-step explanation:

To find the cost of each tube, divide the total cost by the total number of toothpaste tubes.

40.50/7 = 5.785714286 which approximates to 5.79

Answer:

x + 3x = 356

4x     = 356

x = 356/4 = 89.

answer: 89

Step-by-step explanation:

hopefully this helped :)

Answer:

x = 24

y = 10

z = 17

Step-by-step explanation:

4z - 32 = 36

4z = 68

z = 17

6x - 29 = 115

6x = 144

x = 24

36 + 115 = 151

180 - 151 = 29

3y - 1 = 29

3y = 30

y = 10

Answer:11.1 I believe?

Step-by-step explanation:

Forgive me if I am wrong.

Answer:

14.8

Step-by-step explanation:

im gessing thats what it is

Answer:

d = sqrt(17)

Step-by-step explanation:

d = sqrt( x2 - x1)^2 + (y2 - y1)^2  )

d = sqrt( (4 - 5)^2 + (-3 - 1)^2 )

d = sqrt( (-1)^2 + (-4)^2  )

d = sqrt ( 1 + 16)

d = sqrt(17)

Answer:

18+14

Step-by-step explanation:

2×9=18 and 2×7=14

18+14 :)

Answer:

=38

Step-by-step explanation:

Answer:

It's C [-2 0]

Step-by-step explanation:

If you multiply the product [-1 0] both by 2 you get [-2 0]

Answer:

Step-by-step explanation:

The third angle measures:

Angles and opposite sides are:

The greater the angle, the greater the opposite side, therefore the sides in increasing order will be:

Answer:

2

Step-by-step explanation:

Answer:

Fourth Option

Step-by-step explanation:

In order to find the answer to this question you need to change the mixed number into a improper fraction and then add by finding the least common denominator (LCD).

[tex]-\frac{3}{4} +2\frac{3}{4}[/tex]

Convert into improper fraction:

[tex]2\frac{3}{4} =4\times2=8+3=11[/tex]

[tex]-\frac{3}{4} +\frac{11}{4}[/tex]

Since how the denominators are the same you can just add numerators:

[tex]-3+11=8[/tex]

[tex]=\frac{8}{4}[/tex]

Reduce:

[tex]8\div4=2[/tex]

[tex]4\div4=1[/tex]

[tex]=\frac{2}{1}[/tex]

[tex]\frac{2}{1} =2[/tex]

Hope this helps.

Answer:

$11.40

Step-by-step explanation:

make the percent a decimal and multiply the total by the percent in decimal form

56.98*0.20=11.396

then round to the nearest tenth

11.40

Answer:

x = 60°

General Formulas and Concepts:

Pre-Algebra

Geometry

Step-by-step explanation:

Step 1: Set up equation

x° + 90° + 30° = 180°

Step 2: Solve for x

9514 1404 393

Answer:

  18.8 cubic inches

Step-by-step explanation:

The formula for the volume of a cone is useful:

  V = 1/3πr²h

Where r is half the diameter, we can use r=d/2 to write this in terms of diameter:

  V = 1/3π(d/2)²h = (π/12)d²h

For the given dimensions, the volumes are ...

  large cone: v = (π/12)(4.5 in)²(5.1 in) ≈ 27.04 in³

  small cone: v = (π/12)(3 in)²(3.5 in) ≈ 8.25 in³

Then the difference in volume is ...

  (27.04 -8.25) in³ ≈ 18.8 in³

The larger cone has about 18.8 cubic inches more volume.