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torisob [31]
4 years ago
9

Mr. Johnson is also comparing the two mobile phone data plans. Talk First charges $20 plus $5 per GB of data, while Mobile Plus

charges $30 plus $3 per GB of data. At what amount of GB use will the cost of the two data plans be the same? Mr. Johnson wrote this equation for the scenario.
1. d = amount of data used (GB)

2. Talk First = Mobile Plus

3. 20d + 5 = 30d + 3

Analyze Mr. Johnson’s work and identify his mistake.
A In step 1, his variable should be c, representing company.
B In step 2, his translated equation should be Talk First + Mobile Plus = Total
Money.
C In step 3, he multiplied the variable by the base monthly cost instead of by the
cost per GB.
Mathematics
1 answer:
DedPeter [7]4 years ago
7 0

Answer:

2

Step-by-step explanation:

number 2 is incorect

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4 + 3(4 - 2)^2 - 3(3 - 2)^3
Dmitriy789 [7]
PEMDAS

4+3(4-2)^2 - 3(3-2)^3
4+3(2)^2 - 3(1)^3
4+3(4) - 3(1)
4+12-3
16-3
13

The answer is 13
7 0
3 years ago
The capacity at the local pool is 225 people.
AURORKA [14]

a. 88%

b. 80%

Step-by-step explanation:

198/225=.88

180/225=.80

7 0
3 years ago
Michael is doing an underwater handstand. His feet are sticking up 0.5 0.50, point, 5 meters above the surface of the water. Mic
ELEN [110]

Answer:

The position of Michael's hands relative to the surface of the water is -<u>1.3 meters</u>.

Step-by-step explanation:

<u><em>The question is incomplete, so below is the complete question?</em></u>

<em>Michael is doing an underwater handstand. His feet are sticking up 0.5 meters above the surface of the water. Michael's hands are 1.8 meters directly below his feet. What is the position of Michael's hands relative to the surface of the water?</em>

Now, to find the position of Michael's hands relative to the surface of the water.

Meters of Michael's hands directly below his feet = 1.8 meters.

Meters of his feet sticking above the surface of the water = 0.5 meters.

So, to get the position of Michael's hands relative to the surface of the water we subtract meters of Michael's hands directly below his feet from meters of his feet sticking above the surface of the water:

0.5\ meters\ -\ 1.8\ meters\\\\=-1.3\ meters.

Therefore, the position of Michael's hands relative to the surface of the water is -1.3 meters.

4 0
3 years ago
Solve by substitution
goldenfox [79]
Ok here it is:
4x-5y=40
2x+10y=20
I used the second equation and decided to get x
2x+10y=20
Subtract 10y from both sides.
2x=-10y+20
Divide both sides by 2
x=-5y+10
Put that in for x for first equation
4(-5y+10)-5y=40
Distribute the 4
-20y+40 -5y =40
Combine like terms
-25y+40=40
Subtract 40 from both sides
-25y=0
Divide by -25 on both sides
y=0
Substitute the y in for the 2nd equation
2x+10(0)=20
2x=20
Divide both sides by 2
x=10
So x=10 and y=0
5 0
3 years ago
A store pays $8 for a toy boat. The store marks up the price by 30%. What is the new price?
adelina 88 [10]

Answer:

Your answer is $10.40

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
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