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kari74 [83]
3 years ago
15

Evaluate the expression for x = 3, y=13 , and z = 5.

Mathematics
1 answer:
hoa [83]3 years ago
5 0

Answer:

-437

Step-by-step explanation:

x=3,y=13,z=5

12x-3y4x-z

12(3)-3(13)(4)(3)-5

36-468-5

-437

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Biren spends 3/8 of his share on clothes and 1/3​
Nadusha1986 [10]
?? Elaborate pls and I can’t try to help in comments:)
5 0
3 years ago
Solve each system by substitution. Check your answers.<br> 4x+2y=7 , y = 5x
Kazeer [188]

By substitution, the solution of the system of equations, 4x + 2y = 7 and y = 5x, is (1/2 , 5/2).

A system of linear equations is a set of two or more equations which includes common variables. To solve system of equations, we must find the value of the unknown variables used in the equations that must satisfy both equations.

There are three methods that can be used to solve system of linear equations.

1. Elimination

2. Substitution

3. Graphing

Using substitution method, given two linear equations in x and y,

4x + 2y = 7     (equation 1)

y = 5x     (equation 2)

Since the second equation is already expressed in y in terms of x, substitute the second equation to the first equation.

4x + 2y = 7     (equation 1)

4x + 2(5x) = 7

4x + 10x = 7

Combining all terms containing the variable x on one side and the constants on the other side of the equality, and solving for x.

4x + 10x = 7

14x = 7

x = 1/2

Substitute the value of x in the second equation and solve for y.

y = 5x

y = 5(1/2)

y = 5/2

Hence, the solution of the given system of equations is (1/2 , 5/2).

To learn more about solving systems of equations: brainly.com/question/25869125

#SPJ4

5 0
1 year ago
Factor 4x(w + 1) + 5y(w + 1).
Firdavs [7]

Factor w+1 out of 4x(w+1)+5y(w+1).

(w+1)(4x+5y)

plzmark me as brainliest :)

4 0
3 years ago
Marion Pelk worked 9 days in two weeks. He worked each day and was paid $7.1 an hour. What gross pay he earn for the two weeks?
Andrews [41]

Answer:

$1533.60 !

Step-by-step explanation:

$7.10 per hour needs to be times by 24 (to calculate the pay per day) = $170.40 then times that by 9 = $1533.60 (The pay for 9 days which is coincidently the pay per 2 weeks!

Job done! The answer is $1533.60!

[If I am wrong please message me and tell me]

5 0
3 years ago
In two months Mika spent a total of $305.43 on groceries. She spent $213.20 in the first month.How much did she spit in a second
Nostrana [21]

To find out how much she spent during the second month, all we have to do is subtract $305.43 and $213.20

$305.43 - $213.20 = $92.23

Therefore she spent $92.23 during the second month

Hope this helps

4 0
3 years ago
Read 2 more answers
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