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sashaice [31]
3 years ago
13

Simplify (9x + 10) - (7x + 8)

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
8 0

Answer:

2x+2

Step-by-step explanation:

of symbols, representing a value, o relation. example 2+2=4

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What substitution should be used to rewrite 4x^4-21x^2+20 =0 as a quadratic equation
marysya [2.9K]

I would substitute y = x^2

4y^2 -21y+20=0

7 0
3 years ago
Given the following functions f(x) and g(x), solve f[g(7)] and select the correct answer below:
Degger [83]
F(g(7))= f(2×7+2)= f(16)= 4×16+21=85

Therefore: the answer is 85

Hope that helps!! 
7 0
3 years ago
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<img src="https://tex.z-dn.net/?f=-5%2B78%2B%28-32%29" id="TexFormula1" title="-5+78+(-32)" alt="-5+78+(-32)" align="absmiddle"
AysviL [449]
Adding a negative is same as subtraction
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2 years ago
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Solve the equation.<br><br> c/4−5=4<br> Plss show the work too plss! :)
asambeis [7]

Answer: c=36

Step-by-step explanation: c/4-5=4

Add 5 to 4

c/4=9

9 divided by 1/4

C= 36

8 0
3 years ago
Which equation represents a line which is perpendicular to the line y = -x + 8?
natima [27]

Two lines are perpendicular between each other if their slopes fulfills the following property

m_1m_2=-1

where m1 and m2 represents the slopes of line 1 an 2, respectively.

To find the slope of a line we can write it in the form slope-intercept form

y=mx+b

Our original line is

y=-\frac{1}{8}x+8

Then its slope is

m_1=-\frac{1}{8}

Now we have to find the slope of the second line. Using the first property,

\begin{gathered} m_1m_2=-1_{} \\ -\frac{1}{8}m_2=-1_{} \\ m_2=(-1)(-8) \\ m_2=8 \end{gathered}

Then the second line has to have a slope of 8.

The options given to us are:

\begin{gathered} x+8y=8 \\ x-8y=-56 \\ 8x+y=5 \\ y-8x=4 \end{gathered}

Then we have to determine which of these options have a slope of 8. To do that we write them in the slope-intercept form:

\begin{gathered} x+8y=8\rightarrow y=-\frac{1}{8}x+1 \\ x-8y=-56\rightarrow y=\frac{1}{8}x+7 \\ 8x+y=5\rightarrow y=-8x+5 \\ y-8x=4\rightarrow y=8x+4 \end{gathered}

Once we have the options in the right form, we note that the only one of them that has a slope of 8 is the last one.

Then the line perpendicular to the original one is

y-8x=4

8 0
1 year ago
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