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3 years ago

Please help me with this! <3

Mathematics

1 answer:

OlgaM077 [116]3 years ago

5 0

Think of x(symbol)y as a function like f(x)=3x-y. Since the first symbol we see is in parenthesis, we know that x=-1 and y=-2. Plug that into f(x), and you get 3(-1)-(-2)=-1. So know we have the x value for the second symbol, which is -1, and the y value, which is seen to the right: (-3). Plug that back into f(x), and you get 3(-1)-(-3)= 0. Your answer should be A: 0.

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Which statement is true?

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Answer:32

Step-by-step explanation:32 because if you to b squared times 3 to the 4 power you will get 32

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2 years ago

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if motorist drove a distance of 90km at constant speed for the first 40km and then drove 30 km/hr faster for the rest of the jou

elena55 [62]

Answer:

Step-by-step explanation:

The motorist drove at a distance of 90km at a constant speed for the first 40km, and then 20 km/hr faster for the rest of the journey.

The whole journey took him 1hr.

Let S denotes the average speed (in km/hr) for the first 40 km.

Hence we get the following relation,

40/S + (90 - 40)/(S + 20) = 1

or 50/(S + 20) = 1 - 40/S = (S - 40)/S

or (S + 20)(S - 40) = 50S or S^2 - 70S - 800 = 0 or (S - 80)(S + 10) = 0

or S = 80 (km/hr) [Ans]

[S cannot be negative value]

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3 years ago

4n-n<br> If you’d help than

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Answer:

Step-by-step explanation:

if we don't pay attention to the variable, it would be the same thing as 4-1 which is just 3, not in all cases though

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3 years ago

Equation for graph with a x-intercept of -1 and y-intercept of -4

Vera_Pavlovna [14]

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4 years ago

Evaluate and simplify the following complex fraction.

aniked [119]

<h3>Answer: -22/7</h3>

=========================================================

Explanation:

The fraction 6/(-7) is the same as -6/7

We have the two fraction -6/7 and 3/11 being divided

The denominators are 7 and 11 respectively.

The LCM of those two numbers is 77 since 7*11 = 77

If we multiply each of those fractions (-6/7 and 3/11) by 77, then we'll clear out those inner denominators to simplify this complex fraction into a nicer one.

77*(-6/7) = -66

77*(3/11) = 21

This means the original complex fraction becomes -66/21

We can further simplify this by dividing each part by the GCF 3

-66/3 = -22

21/3 = 7

Therefore, the final answer is -22/7

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3 years ago