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AnnZ [28]
3 years ago
14

Please help, anyone! I really need help!

Mathematics
1 answer:
valkas [14]3 years ago
4 0
The answer is linear negative association
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Solve for x x(5x+2)=0​
maksim [4K]

Answer:

x = 0.4

x = 2/ 5

Step-by-step explanation:

3 0
3 years ago
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20 POINTS! Please solve and show work! Any problem you solve helps! Thanks!
dimulka [17.4K]

Answer:

3. X = 13.42

Step-by-step explanation:

12² + x² = 18²

144 + x² = 324

-144           -144

x² = 180

√x² = √180

x = 13.41640 (unsure of how teacher would want you to round this, probably in the hundredths)

x = 13.42

5 0
4 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
Evaluate when x = 7 and y = 6 <br> 2x - 3y
IRISSAK [1]
The Answer Here Is -4
5 0
3 years ago
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For a given right triangle side a=76.4 ft and side b=39.3 ft. What is the measure of angle A to the nearest degree?
Neporo4naja [7]

Answer:

27

Step-by-step explanation:It would tan and since we are finding the angle it would  be tan negative. then we just place tan negative 39.3 divided by 76.4 in the calculator. make sure the calculator is set to degree!

4 0
4 years ago
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