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mina [271]
3 years ago
5

matthew has a jar of 368 nickels and imes he has been collecting. The total value of the coins is $28.40. which system of linear

equations and solutions can be used to represent the number of nickels and dimes Matthew has inhis collection
Mathematics
1 answer:
Drupady [299]3 years ago
8 0
28.40 bucks ? are you Sure 
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Acellus. Solve for x. x = ?
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Answer:

according to basic proportionality theorem

\qquad\sf {:}\longrightarrow 25/35=x/63

\qquad\sf {:}\longrightarrow 5/7=x/63

\qquad\sf {:}\longrightarrow 7x=63×5=315

\qquad\sf {:}\longrightarrow x=315/7=45

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Find the coordinates of the image after a reflection across the line y = x.
Marat540 [252]

Answer:

(2 1) for L (4 3) for G  (4 -1)

Step-by-step explanation:

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You placed a 12% down payment on a new home. Given that the amount of the down payment was $42,655.12, determine the price of th
Soloha48 [4]

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355,459.33

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3 years ago
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The expression 3x^3-5x^2+3x-1 has ___ terms and a constant of ____.
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3 years ago
A food packet is dropped from a helicopter and is modeled by the function f(x) = −15x2 + 6000. The graph below shows the height
melisa1 [442]

General Idea:

Domain of a function means the values of x which will give a DEFINED output for the function.

Applying the concept:

Given that the x represent the time in seconds, f(x) represent the height of food packet.

Time cannot be a negative value, so

x\geq 0

The height of the food packet cannot be a negative value, so

f(x)\geq 0

We need to replace -15x^2+6000 for f(x) in the above inequality to find the domain.

-15x^2+6000\geq 0 \; \;  [Divide \; by\; -15\; on\; both\; sides]\\ \\ \frac{-15x^2}{-15} +\frac{6000}{-15} \leq \frac{0}{-15} \\ \\ x^2-400\leq 0\;[Factoring\;on\;left\;side]\\ \\ (x+200)(x-200)\leq 0

The possible solutions of the above inequality are given by the intervals (-\infty , -2], [-2,2], [2,\infty ). We need to pick test point from each possible solution interval and check whether that test point make the inequality (x+200)(x-200)\leq 0 true. Only the test point from the solution interval [-200, 200] make the inequality true.

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But we already know x should be positive, because time cannot be negative.

Conclusion:

Domain of the given function is 0\leq x\leq 200

4 0
3 years ago
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