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Sedbober [7]
3 years ago
11

42 decreased by twice gorans savings

Mathematics
1 answer:
Anvisha [2.4K]3 years ago
7 0
The number 42 and then decrease it or subtract twice what ever he has in savings. 42-(2GS)    GS is goarans savings. most of the time we would use a variable like x so it could be written as 42-(2x) depends on how the teacher wants it.
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The statements that are true are:
First option: All functions have dependent a variable
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Fifth option: A horizontal line is an example of a functional relationship
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Which of the following quotients are negative check all that apply
ella [17]
With the true and the right negative
4 0
3 years ago
Julio bought 4 pencils and 3 erasers for $0.37 and David paid $0.33 for 3 pencils and 4 erasers. What is the cost of one pencil?
nirvana33 [79]

Answer:

Each pencil costs $0.07 and each eraser costs $0.03

Step-by-step explanation:

System of linear equations

It refers to the study of systems when n variables are related in m linear equations, each one is not independent from the others. Solving such systems can be done following very diverse approaches.  

Let p=the price of each pencil while e is the price each eraser

Julio bought 4 pencils and 3 erasers, spending

4p+3e=0.37

David bought 3 pencils and 4 erasers, spending

3p+4e=0.33

The system of equations is written in the form

\left\{\begin{matrix}4p+3e=0.37\\ 3p+4e=0.33\end{matrix}\right

We'll solve it by reduction. Multiplying the first equation by -3 and the second by 4:

\left\{\begin{matrix}-12p-9e=-1.11\\ 12p+16e=1.32\end{matrix}\right.

Adding both equations:

7e=0.21  

e=0.03

Multiplying the first one by -4 and the second by 3

\left\{\begin{matrix}-16p-12e=-1.48\\ 9p+12e=0.99\end{matrix}\right.\end{matrix}\right.

Adding both equations:

-7p=-0.49

p=0.07  

Solution: Each pencil costs $0.07 and each eraser costs $0.03

7 0
3 years ago
What must be added to 12x3
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Answer:

+3x + 7 to make the sum x3

Step-by-step explanation:

to find the sum of 3 and to solve it to get the value of x

3 0
2 years ago
Tell me how you got the answer
Anvisha [2.4K]

Answer:

x = 18; y = 20

Step-by-step explanation:

6.

Triangles KLM and KNO are similar, so the ratios of the lengths of corresponding sides are equal.

KL/KN = LM/NO

10/30 = 6/x

Cross multiply.

10x = 6 * 30

10x = 180

x = 18

KL + LN = KN

10 + y = 30

y = 20

8 0
3 years ago
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