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2 years ago

2x+2y=17 4x-y=25 What is the x value of the system of equations

2 answers:

4 0

X=4.2
For the second equation, y=4x-25. Then you plug that into the first equation, which would form: 2x+2(4x-25)=17. Simplify. 2x+8x-25=17. 10x=42. x=4.2

umka2103 [35]2 years ago

4 0

Answer:

6.7 is the value of x.

Step-by-step explanation:

Given equations are

2x+2y=17 eq(1)

4x-y=25 eq(2)

from eq(2), we get

-y=25-4x

multiplying by -1 to above equation, we get

y=-25+4x

y=4x-25

subtitute above value of y in eq(1), we get

2x+2(4x-25)=17

2x+8x-50=17

add 50 on both sides of above equation, we get

2x+8x-50+50=17+50

2x+8x+0=17+50

2x+8x=17+50

add like terms

10x=67

dividing by 10 on both sides of above equation, we get

10x/10=67/10

x=67/10=6.7 which is the answer.

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Write two prime numbers whose difference is 10?

bagirrra123 [75]

23-13=10

Prime numbers : A whole number greater than 1 that can not be made by multiplying other whole numbers Prime numbers between 1 to 100 : 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, and 97 So, The two numbers whose difference is 10 are 13 and 23 23-13=10

3 0

3 years ago

Gracelyn has multiple sticks of different lengths to build a triangle for a class project. Which 3 lengths could Gracelyn choose

romanna [79]

Hello

11 cm, 25 cm, 15 cm
if you add the lengths of two sides of the triangle, it must be greater than the length of the third side

therefore, the only possible lengths are 11 cm, 25 cm, 15 cm

Have a nice day

8 0

3 years ago

A student solving for the acceleration of an object has applied appropriate physics principles and obtained the expression a=a1+

egoroff_w [7]

Answer:

$a=\frac{3\times 7}{7}+\frac{12}{7}$ (First step for obtaining a common denominator for the two fraction)

$a=\frac{33}{7}\text{ m/s}^2$

Step-by-step explanation:

$\text{Given Expression: }a=a_1+\frac{F}{m}$

where,

a is acceleration of an object.(Need to calculate)

$a_1=3.00\text{ m/s}^2$

$F=12.0\text{ Kg.m/s}^2$

$m=7.00\text{ kg}$

$\text{Substitute }a_1, \text{ F, and m into expression and we get}$

$a=3+\frac{12}{7}$

Now we will simplify above expression for a

First we make common denominator.

Common denominator is 7. So, we make both denominator 7. We multiply by 7 at top and bottom with 3. We get

$a=\frac{3\times 7}{7}+\frac{12}{7}$ (First step for obtaining a common denominator for the two fraction)

Now we combine the numerator

$a=\frac{21+12}{7}$

$a=\frac{33}{7}\text{ m/s}^2$

3 0

3 years ago

Read 2 more answers

The number of eligible voters who cast ballots on election day is referred to as the:_____-.

kozerog [31]

The number of eligible voters who cast ballots on election day is referred to as the <u>VOTER TURNOUT.</u>

<u></u>

<h3>What is the voter turnout?</h3>

This refers to the number of a nation's registered voters who actually vote for various positions on election day.

This figure is important because it shows just how much of the population has faith in the electoral system and so trust it to count their vote.

Find out more on voter turnout at brainly.com/question/1747503

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7 0

1 year ago

If (x, y) = (3, 4) is a solution of the simultaneous equations.

Vinvika [58]

The first thing you want to do is plug in x and y into both equations:

a(3) + b(4) = 4

b(3) + a(4) = 8

rearrange to line up a’s and b’s

3a + 4b = 4

4a + 3b = 8

now you want to choose a or b and multiply each equation by a number to make them have the same amount of a’s or b’s.

4(3a + 4b = 4) = 12a + 16b = 16

3(4a + 3b = 8) = 12a + 9b = 24

Now we subtract the bottom equation from the top and solve for b:

12a + 16b - (12a + 9b) = 16 - 24

7b = -8

b = -8/7

Now we plug back in for b to one of the original equations:

3a + 4(-8/7) = 4

3a + (-32/7) = 4

3a - (32/7) = 4

3a = 4 + (32/7)

3a = (28/7) + (32/7)

3a = 60/7

a = (60/7)/3 = 20/7.

Finally, plug a and b in together to double check using the second equation.

4a + 3b = 8

4(20/7) + 3(-8/7) = ?

(80/7) - (24/7) = ?

56/7 = 8.

4 0

2 years ago