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Gwar [14]
2 years ago
9

Solve the system of equations by substitution.3x+2y=10 y=3x-4x= y=​

Mathematics
1 answer:
AfilCa [17]2 years ago
4 0

Answer:

x=2;  y=2

Step-by-step explanation:

3x+2y=10

y=3x-4

We can substitute y from the first equation with the second equation:

3x+2(3x-4)=10

3x+6x-8=10

9x=18

x=2

Now plug this in to any of the equations (i used second equation):

y=3(2)-4

y=6-4

y=2

Check your answers:

y=3x-4

2=3(2)-4

2=6-4

2=2

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alexandr402 [8]
<span>We use ratio and proportion to solve each of these:
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</span><span>2. The scale of a map is 7 in = 16 mi map: 4.9 in actual: ______ mi
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</span><span>3. The scale factor for a model is 5 cm = ________ m Model : 72.5 cm actual: 165.3 m
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</span><span>4. The scale of a map is 1 in = 9.6 mi map: ________ in actual: 34.7 mi
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</span><span>5. The scale of a map is 1 ft = 9.6 mi map: ________ ft actual: 38.4 mi
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</span><span>6. The scale factor for a model is 5 cm = ________ m Model : 22.4 cm actual: 155.2 m
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3 0
3 years ago
Solve 2x+7=x-3 Please can u show your working out
Korolek [52]
X= -10
You may review the image Ive attached to see how I got this answer.

7 0
3 years ago
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zubka84 [21]

Answer:

The exponential function is A(t) = 1000(1.004)^{12t}.

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Step-by-step explanation:

Compound interest:

The compound interest formula is given by:

A(t) = P(1 + \frac{r}{n})^{nt}

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per year and t is the time in years for which the money is invested or borrowed.

Deposit $1000 in a savings account that pays 4.8% interest compounded monthly.

This means that P = 1000, r = 0.048, n = 12. So

A(t) = P(1 + \frac{r}{n})^{nt}

A(t) = 1000(1 + \frac{0.048}{12})^{12t}

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A(t) = 1000(1.004)^{12t}

This is the exponential function

How much will you have in your account after 2 years?

This is A(2). So

A(2) = 1000(1.004)^{24} = 1100.55

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elixir [45]

Answer:

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Which of the following points are located 3 units from (-4,-2) ?
yawa3891 [41]
The units (-3,-1) and (-0,-0) are the following units located at (-4,-2).
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