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yarga [219]
3 years ago
12

Y=-x+7 , y=x-1 and show your work Help !

Mathematics
1 answer:
Gelneren [198K]3 years ago
7 0
This is a system of equations. The best way to solve it is by realizing that you have two equations equal to y. Since y = y, it follows that -x+7=x-1. Solving for x, you get 4.

7=2x-1 \\ 8=2x \\ 4=x

Then, substitute 4 into one of the original equations to find y.

y=(4)-1=3.

The solution is (4,3). I have attached a graphical representation of the solution as well.

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Ivan and Tanya share £150 in the ratio 4: 1<br>Work out how much more Ivan gets compared to Tanya.​
Anastasy [175]

Answer:

Ivan got £90 more than Tanya.

Step-by-step explanation:

Ivan and Tanya share the amount £150 in the ratio of 4 : 1

Amount received by Ivan = 150\times \frac{4}{(4+1)}

                                          = 150\times \frac{4}{5}

                                          = £120

Similarly, amount received by Tanya = 150\times \frac{1}{(4+1)}

                                                             = £30

Difference in their amounts = 120 - 30

                                              = £90

Therefore, Ivan got £90 more than Tanya.                                                                                                        

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2 years ago
What is the first step needed to solve 3 over 4 multiplied by x minus 3 equals negative 18?
kodGreya [7K]
Minus 3 from the 3 and the 18
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If three dozen cookies cost $9, what is the cost per cookie?
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Find the inverse function. f (x)=1/2x+6
Lana71 [14]

The inverse of this function is f(x) = 2x - 12.

You can find the inverse of any function by switching the f(x) and x values in the equation. Then you can solve for the new f(x) value. The result is your inverse function. The work for this one is below.

f(x) = 1/2x + 6 ----> switch f(x) and x

x = 1/2f(x) + 6 ----> subtract 6

x - 6 = 1/2f(x) ----> multiply by 2

2x - 12 = f(x) ----> change the order for consistency.

f(x) = 2x - 12

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3 years ago
Which postulate or theorem proves that triangle JHG and
antiseptic1488 [7]

Answer:

The answer is AS A Congruence Postulate.

Step-by-step explanation:

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