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3 years ago

Please help and explain A B C D

Mathematics

2 answers:

nataly862011 [7]3 years ago

8 0

For D

subtract $25 from $425 you will be left with $400 that is the total with out the addition $25 in which Gavin earned more of.

You are now left with $400 for both Gavin and Seiji
because they are 2 in number divide the money by 2 which will give you $200 each, then add Gavin's extra $25.

Gavin earned $225
and Seiji earned $200

avanturin [10]3 years ago

4 0

A) Amount of money earned by seji = s
Amount of money earned by Gavin = g
So, equation would be: s+g = 425

B) Solving the system: s+g = 425
we know, g = s+25
Substitute it into the equation:
s+s+25 = 425
2s = 400
s = 200
so, g = 200+25 = 225

C) Graph for the equation, Mark (s,g) = (200,225) then, draw the line from the origin.

D) Seiji earned = $200
Gavin earned = $225 [ Solved in B part ]

Hope this helps!

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katen-ka-za [31]

Answer:

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Step-by-step explanation:

We can write an equation to model the parabolic arch.

Let the left-most point of the arch be the origin (0, 0).

Since the bridge has a span of 100 feet, the right-most point must be (0, 100).

We can use the factored form of a quadratic:

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Where p and q are the x-intercepts.

Our x-intercepts are x = 0 and x = 100. Hence:

$y=ax(x-100)$

At a point 40 feet from the center, the height of the arch is 10 feet.

The center is x = 50. So, a point 40 feet from the center can be either x = 10 or x = 90.

So, for instance, when x = 10, y = 10. Substitute and solve for a:

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So:

$\displaystyle a=-\frac{1}{90}$

The same value will result if we let x = 90 and y = 10.

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$y(50)=\displaystyle -\frac{1}{90}(50)((50)-100)=\frac{250}{9}\approx 27.78\text{ feet}$

4 0

3 years ago

PLEASE HELP ME WITH THIS

gladu [14]

Answer:

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Step-by-step explanation:

First

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The total time is ( 4 - 2) = 2 hours.

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Change = 14/2 = 7 per hour.

Second

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Considering DF is the full length.

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