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andriy [413]
2 years ago
13

Someone help and plz make sure it’s right :)

Mathematics
1 answer:
Mandarinka [93]2 years ago
5 0

Answer:

X+51=180-(45+90)

X+51=45

X=45-51

X=-6

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the index of 2 is -1

Step-by-step explanation:

2^{-1}

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=\frac{1}{2}

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Find all relative extrema of the function. use the second derivative test where applicable. (if an answer does not exist, enter
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The given quadratic describes a parabola that opens upward. Its one absolute extreme is a minimum that is found at x = -3/2. The value of the function there is
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For the parabola described by ax² +bx +c, the vertex (extreme) is found where
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1/15 because it’s 1 in every 15 minutes.
8 0
3 years ago
The volume of a cylinder is 980pi in3. The radius is 7 in. What is its height?
Dovator [93]

Answer:

D) 20 in

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7 0
3 years ago
Read 2 more answers
Help me out with number 8!!! I’m confused and I need this by tomorrow HELP PLEASE
ivann1987 [24]
We can use elimination for these set of systems.
First, we need to set up our variables.
Belts=b
Hats=h
Now, the situation is 6 belts and 8 hats for $140. The situation after is 9 belts and 6 hats for $132.
Let’s set up our system of equations.
6b+8h=140
9b+6h=132
We need to eliminate a variable. Since b has coefficients of 6 and 9, we can easily eliminate b by multiplying the top equation by 3 and the bottom by -2.
18b+24h=420
-18b-12h=-264
Now let’s add.
12h=156
Let’s divide to get h by itself.
156/12=13=h
So a hat costs $13. We need to put in 13 for one of the equations so we can find the cost of a belt.
9b+6(13)=132
9b+78=132
We need b by itself.
9b=54
54/9=6
Belts are $6
We can also use the first equation to check our answers.
6(6)+8(13)
36+104
140.
So, the price of a belt is $6 while the price of a hat is $13.
































3 0
2 years ago
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