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lbvjy [14]
3 years ago
14

У = 2x X + y = 9 Solve please

Mathematics
1 answer:
pochemuha3 years ago
6 0

Answer:

(3, 6) or x = 3 and y = 6

Step-by-step explanation:

у = 2x, x + y = 9 (using substitution)

x + 2x = 9

3x = 9

x = 3

y = 2x

y = 2(3)

y = 6

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Two friends, Aria and Kaylee, took summer jobs. The equation y = 20.2 x y=20.2x represents Kaylee's earnings in dollars and cent
Sever21 [200]

Answer:

y=19.4x------represents Aria's earnings in dollars and cents,

Step-by-step explanation:

The question is not complete, however, the idea from this response can provide the needed solution and understanding

 Step one:

The linear function for the earnings is given as

y = 20.2x-----this represents Kaylee Earnings.

y represents the total earnings

x represents the earning rate, in this situation it $20.2 per hour, this is also the gradient of the function m

Step two:

we want to find th equation for Aria earning

y= $737.20

time taken x=38 hours

737.2=m(38)

divide both sides by 38

m=737.2/38

m=19.4

this means that Aria earn $19.4 per hour

the function for Aria is

y=19.4x

3 0
3 years ago
PLZZZZZZ HELPPPPPP QUESTION 2<br> ATTACHMENT BELOW
Harrizon [31]
Hello! So, you have a ½ chance of landing on black. To find the possibility that it will land on black 3 times, we multiply fractions, because when it comes to getting a combination, chances lower. ½ * ½ * ½ is 1/8. There is 1/8 of a chance that the spinner will land on black 3 times. The answer is D: 1/8.
7 0
3 years ago
Jesse sold cupcakes and cookies yesterday. Each cupcake sold for $1.50 and each cookie sold for $0.25. At the end of the day, Je
ale4655 [162]

Answer: 19 cupcakes and 37 cookies were sold.

Step-by-step explanation:

Let x represent the number of cupcakes that Jesse sold yesterday.

Let y represent the number of cookies that Jesse sold yesterday.

If he sold 56 cupcakes and cookies combined, it means that

x + y = 56

Each cupcake sold for $1.50 and each cookie sold for $0.25. At the end of the day, Jesse had sold $37.75 worth of cookies and cupcakes. This means that

1.5x + 0.25y = 37.75 - - - - - - - - - - -1

Substituting x = 56 - y into equation 1, it becomes

1.5(56 - y) + 0.25y = 37.75

84 - 1.5y + 0.25y = 37.75

- 1.5y + 0.25y = 37.75 - 84

- 1.25y = - 46.25

y = - 46.25/ - 1.25

y = 37

x = 56 - y = 56 - 37

x = 19

7 0
3 years ago
Can someone help. I’m having trouble with the equation part
mote1985 [20]

Answer:

(x+3) x+7 is the answer for the first question if it's the same way my school does it. Whatever you put in parentheses is the opposite of what you think. + is going to the left. - is going to the right but those only apply when in parentheses.

7 0
3 years ago
There were 48 runners to start a race. In the first half of the race, 2/5 of them dropped out. In the second half of the race, 1
12345 [234]

Answer:

SDDAA

Step-by-step explanation:


7 0
3 years ago
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