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3 years ago

2x - 5y = 5 and y = x + 2

Mathematics

2 answers:

Dafna1 [17]3 years ago

8 0

Answer:7

Step-by-step explanation:

mars1129 [50]3 years ago

7 0

Answer:

x = -5 & y = -3

Step-by-step explanation:

2x - 5y = 5 --------------------------(I)

y = x + 2 -----------------------(II)

Using substitution method

Substitute y = x + 2 in equation (I)

2x - 5(x + 2) = 5

2x - 5*x + (-5)*2 = 5

2x - 5x - 10 = 5

Combine like terms

-3x - 10 = 5 {Add 10 to both sides}

-3x = 5 +10

-3x = 15 {Divide both sides by (-3)}

x = 15/(-3)

x = -5

Substitute the x = (-5) in equation (II)

y = -5 + 2

y = -3

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The accompanying table shows the value of a car over time that was purchased for

Dafna1 [17]

The value of the car after 11 years is $3137.18

<h3>exponential function</h3>

An exponential function is in the form:

y = abˣ

where a is the initial value of y, b is the factor, y, x are variables.

Let y represent the value of the car in dollars after x years. From the table:

When x = 0, y = 12700, hence:

12700 = ab°
a = 12700

When x = 2, y = 9849, hence:

9849 = 12700b²
b = 0.8806

The exponential function is:

y = 12700(0.8806)ˣ

For 11 years:

y = 12700(0.8806)¹¹ = 3137.18

The value of the car after 11 years is $3137.18

Find out more on exponential function at: brainly.com/question/12940982

3 0

2 years ago

8x-5y= 14 – 5х+бу = -3

podryga [215]

Answer:

y= 34/23

x= 123/46

Step-by-step explanation:

Solve for x

8x-5y= 14

x= 14/8 +5/8y

Sub x into second equation

– 5х+бу = -3

-5(14/8 +5/8y) + 6y= -3

-29/4 +23/8y = -3

y= 34/23

Sub y into any equation and solve for x

8x=483/23

x= 123/46

4 0

3 years ago

3.4=21 2.5=7. 4.4=؟

Licemer1 [7]

Answer:

Step-by-step explanation:

From the given values

The possible logic could be

if x.y is given

then it is equal to $=\frac{(x+y)\times x}{y-3}$

For 1st example

3.4 $=\frac{(3+4) \times 3}{4-3} =\frac{21}{1} =21$

For 2nd example

2.5 $=\frac{(2+5) \times 2}{5-3} =\frac{7 \times 2}{2} =7$

⇒4.4 $=\frac{(4+4)\times 4}{4-3} =32$

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3 years ago

Tom has 2 more than 5 times the number of CD’s that Jane has. Jane has 5 CD’s. Write an

Soloha48 [4]

Step-by-step explanation:

t=2+5×j

j=5

t=2+5×5

t=27

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2 years ago

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3 years ago