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Alecsey [184]
4 years ago
7

When solving the system x + 2y = 9 and x - y = 6 by substitution, what can be substituted for x in the second equation?

Mathematics
1 answer:
bazaltina [42]4 years ago
8 0
X+2y = 9 ---------eq.1
x-y =6 ----------- eq.2

x = 9 -2y (from eq. 1)

Now substitute the value of x in the second eq.2

9-2y-y =6
-3y = -3
y =1

So,
x +2 (1)= 9
x= 7


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What are the steps to solve 18-[-(7-14)-5]-9
Jlenok [28]
PEMDAS!

1.  7-14=-7
2. -1*-7 = 7-5=2
3. 18-2-9 = 7
6 0
3 years ago
N f(x) = -3x+4, find f(-2)
hoa [83]

Answer: f(-2) = 10

Step-by-step explanation:

To fin f(-2), we must plug -2 in for x

y = -3x + 4

y = -3 (-2) + 4 = 6 + 4 = 10

4 0
3 years ago
2x - 4 - 6(x + 1) = 5x + 6 a) 8 b) -8/9 c) 4 d) -16/9
andriy [413]
<h2>d) X= - 16/9</h2>

Step-by-step explanation:

2x - 4 - 6(x + 1) = 5x + 6

2x - 4 - 6x - 6 = 5x + 6

2x - 6x - 5x = 4 + 6 + 6

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x= -16/9

<em>Hope</em><em> </em><em>this helps</em><em>.</em><em>.</em><em> </em><em>Good</em><em> </em><em>luck</em><em>!</em>

3 0
3 years ago
You have just arranged for a $1,560,000 mortgage to finance the purchase of a large tract of land. the mortgage has an apr of 5.
seraphim [82]
P=1560000
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R=1+i=1+7/1500
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monthly payment, A
A=PR^n(i)/(R^n-1)
=1560000*(1+7/1500)^360*(7/1500)/((1+7/1500)^360-1)
=$8955.632

At the end of eight years,
number of periods, n1 = 8*12 = 96

If paid off at the end of 8 years, value of loan then
future value of principal
F1=PR^n1=1560000*(1+7/1500)^96=2439135.635
future value of payments
F2=A(R^n1-1)/i=8955.632*(1+7/1500)^96-1)/(7/1500)=1081485.620
Therefore the balloon payment
= future value of principal (owing) - future value of payments (paid)
=F1-F2
=2439135.635-1081485.620
=1357650.0152
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3 0
3 years ago
A drink is made from fruit juice and soda on the ratio 1:4.
mariarad [96]

Answer:

it is made of 1400ml of soda

Step-by-step explanation:

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