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Furkat [3]
4 years ago
14

54 POINTS! Solve each system by substitution 3.) x+5y=6 3x-7y=-4

Mathematics
1 answer:
Nadya [2.5K]4 years ago
5 0
The first equation would be y=-1/5x+6/5. The second equation would be y=3/7x+4/7.
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How do I simplify (2x1/4) -4th power?
alina1380 [7]
Since the 2 and x^1/4 are multiplying we can do the math separately and then just multiply them afterwards

2^-4 is the same as 1/(2^4) which is 1/16

(x^1/4)^-4    (POWER RULES REVIEW)
                          2 exponents of same base you just add (basically multiply                                                                                                              the two)
so x^(1/4x-4)  = x^(-1)

which is just 1/x

so the answer is 1/16x
 
5 0
3 years ago
What is the slope of the line perpendicular to y = -4x + 7?A) -4B) 4C) 1/4D) -1/4
Margaret [11]

Two lines are perpendicular when the product between the slopes of the lines is equal to -1, then, if we have the following lines:

\begin{gathered} y_1=m_1x+b_1 \\ y_2=m_2x+b_2 \end{gathered}

they will be perpendicular if,

m_1\cdot m_2=-1

According to the exercise, the first line is:

y=-4x+7

the slope for this line is -4.

Write the equation that makes two lines perpendicular,

-4\cdot m_2=-1

solve for m2,

\begin{gathered} m_2=\frac{-1}{-4} \\ m_2=\frac{1}{4} \end{gathered}

Answer:

The slope of the line perpendicular to y=-4x+7 is 1/4.

7 0
1 year ago
Can you answer on #1
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So he bought 8.5 pounds, and you have to find out how many ounces he bought. That would mean that you have to convert pounds to ounces. There are 16 ounces in 1 pound. In 8.5 pounds, there are 136 ounces.
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.035 is the answer to your question



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