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n200080 [17]
3 years ago
10

Which of these shows the result of using the first equation to substitute for y in the second equation then combing like terms

Mathematics
1 answer:
AnnyKZ [126]3 years ago
8 0

2x + 3y = 55

2x + 3(3x) = 55

2x + 9x = 55

11x = 55

\frac{11x}{11}  =  \frac{55}{11}

x=5

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the GCD of three numbers is 30 and there LCM is 900 Two of the numbers are 60 abd 150 .what is the least possible value of the t
Artemon [7]

Answer:

180

Step-by-step explanation:

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3 years ago
Jenny and Kath hire the canal boat for 14 days. They share the hire cost of £1785.00 in the ratio 2:3. Work out the smaller shar
Dafna1 [17]

Answer:

£714.00

Step-by-step explanation:

The first step is to set up expresssions for the two shares:

Let  x = the amount of one share.  The other share is 1785 - x.  <u>You don't have to worry about which is smaller--that part will work out automatically</u>!

The two shares are in the ratio of 2:3, so set up the proportion

\frac{x}{1785-x}=\frac{2}{3}

Again, you don't have to worry--you could set up the proportion "upside down" and everything will work out in the end.

Solve the proportion for  x  by "cross multiplying" -- use the Means-Extremes Property of proportions.

(3)(x)=(2)(1785-x)\\3x=3570-2x\\5x=3570\\x=714

So one share is £714£ and the other is £1785 - £714 = £1071.

The smaller share is £714.

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5 0
3 years ago
How do i solve for x if 6x - 6 - 7x =6
Dmitry_Shevchenko [17]

Answer:

X = 12

Step-by-step explanation:

Step  1  :

Pulling out like terms :

1.1     Pull out like factors :

  -x - 12  =   -1 • (x + 12)

Equation at the end of step  1  :

Step  2  :

Solving a Single Variable Equation :

2.1      Solve  :    -x-12 = 0

Add  12  to both sides of the equation :

                     -x = 12

Please said thanks

7 0
3 years ago
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Yakvenalex [24]
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Explanation:

64.75 = 100%

So that mean 50% would be half of 64.75

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8 0
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Alona [7]

Step-by-step explanation:

I don't know the answer to this one so could someone please tell me

Thanks

7 0
3 years ago
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