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RUDIKE [14]
3 years ago
5

Dan’s dog-walking job pays $15 per hour. His job as a car-wash attendant pays $400 each week. Dan wants to know how many hours h

e needs to spend walking dogs to earn more than $520 in a week. Which three inequalities can model this situation? Select all the correct answers. x(15 + 400) > 520 520 < 400 + 15x 15x > 120 15x + 520 > 400 520 < 15x + 400x 15x + 400 > 520
Mathematics
1 answer:
Rus_ich [418]3 years ago
7 0

Answer:

an needs to walk dogs for at least 9 hours in order to earn more than $520 a week.

Step-by-step explanation:

Since his car wash attendant job pays $400 a week then you can subtract that from your final revenue.

$520-$400=$120

Now, to find out how many hours he has to walk dogs for in order to earn more than $520, you need to know some basic multiplication so...

$15×8=$120

...but he needs to earn MORE than $520 so...

$15×9=$135

$400+$135=$535.

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Please help me solve this #algebra #algebra1
Vesna [10]

Answer:

h = 430

Step-by-step explanation:

1290 = h/10 + h/5             Make h/5 into something that is something / 10

1290 = h/10 + 2h/(5*2)     Clean up the brackets.

1290 = h/10 + 2h/10         Add the right.

1290 = 3h/10                    Multiply both sides by 10

1290*10 = 10(3h/10)          

12900 = 3h                       Divide both sides by 3

h = 430

3 0
3 years ago
Choose the correct equation type for each system.
Lunna [17]

Answer:

Inconsistent= 1, & 3

Equivalent= 2&6

Consistent= 4&5

Step-by-step explanation:

Equivalent means both sides of the equation has similar results

Consistent means the equation has an order pair of x, y that make it true

Inconsistent means impossible to solve using a set of values for the variable

1. y=3x-2

  3x-y=4----------------make y subject of equation as 3x-4=y

Equate the two equation

y=3x-2

y=3x-4

3x-2=3x-4---------------collect like terms

3x-3x=-4+2

0=-2---------------inconsistent

2. 1/2 y=-x+5------------multiply by 2 both sides to have y=-2x+10

    2y=-4x+2

we have

y=-2x+10----------------------use y in this equation in the second equation

2y=-4x+20

2(-2x+10)=-4x+20

-4x+20=-4x+20----------------Equivalent

3. y=-x+4----------------use this in the second equation as

   x=-y-6

x= - (-x+4)-6

x= x-4-6

x=x-10--------------collect like terms

x-x= -10

0= -10--------------inconsistent

4. y=4x+2

   y=6x-10-----------equate the two

4x+2=6x-10----------collect like terms

4x-6x=-10-2

-2x=-12

x=6---------------------use to find y

y=4(6)+2=24+2=26

(x,y)=(6,26)---------consistent

5. y=2x+1

   y=-2x+3

Equate the two equation

2x+1=-2x+3-------------collect like terms

2x+2x=3-1

4x=2

x=1/2----------use to find y

y=2 *1/2 +1 =1+1=2

(x,y) = (1/2, 2)---------------consistent

6. -2x +5y=0

   y=2/5x-------------------use this in the first equation

   -2x + 5(2/5 x)=0

   -2x+2x =0

0=0-----------------------Equivalent

 

5 0
3 years ago
Plz help!! I will give most brainliest!! No links plz!!!
pochemuha

Answer: May 20th

Step-by-step explanation: Using basic math to decide that 3x5 is 15 and 5x3 is 15, you can see that after 5 diving lessons and 3 swimming lessons, Bridget will have both again in 15 days time.

5 0
2 years ago
Antonia likes calculating the sum of the digits that she sees on her digital clock (think of a microwave clock). For example, if
slega [8]

Answer:

The largest sum she can get on a 12-hour digital clock is 17.

Step-by-step explanation:

The largest time found in a 12-hour digital clock is 12 hours and 59 minutes. If you add 12:59/ 1+2+5+9 it equals to 17. Hope this helps.

8 0
3 years ago
If ab = c - d, which of the following is an expression for d in terms of a, b, and c?
horsena [70]
ANSWER

d =  - ab + c


EXPLANATION


The given expression is

ab = c - d

To find an expression for d in terms of a, b, and c, means we want to make d the subject of the relation.


This means that, we need to isolate d on one side of the equation while all other terms are on the other side.



We subtract from both sides of the equation to obtain,


ab - c = - d



We now divide through by -1, to get,



- ab  +  c = d


Or


d = - ab  +  c


The topic is change of subject
3 0
3 years ago
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