I need answers to a, b, and c.

Mathematics

1 answer:

worty [1.4K]3 years ago

6 0

A is the same price b is 46$ and don't know what c is

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Please solve the combination of equations here.

klemol [59]

Answer:

$\left \{ {{x=5} \atop {y=7}} \right.$

Step-by-step explanation:

$\left \{ {{x+y=12} \atop {3y = 4x+1}} \right.$

$\left \{ {{x=12-y} \atop {3y=4x+1}} \right.$

We are going to do a replacement of x for a second equation

So instead

$3y=4x+1$

in the place of x we are putting 12-y from the first equation, so

$3y = 4(12-y)+1$

To leave the brackets we need to do multiplication

$3y = 4*12-4*y+1$

Which is

$3y = 48-4y+1$

$3y = -4y+49 /+4y\\7y = 49 /:7\\y = 7$

How to determine x? From the first equation:

If the x +y = 12 then the x = 12-y so x = 12-7 = 5

We should write solution as a pair:

$\left \{ {{x=5} \atop {y=7}} \right.$

7 0

3 years ago

What is an angle that is formed by two non coplanar half planes and their line of intersection?

poizon [28]

The answer is <span>dihedral angle. It is the angle between two planes that intersected. It can be used in chemistry also in which it is the angles between two bonds and also in aerodynamics in which it is the upward angle that the wings are contacting with.</span>

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3 years ago

Brayden, Howard, and Vincent are on the football team. During a game, Brayden gains 1 less than 5 times the average number of ya

Gnoma [55]

Answer: If two pair is parallel then it has no solution.

Step-by-step explanation:

Since we have given that

Let the number of gained yards by each player be y

For the case of Brayden:

Equation will be

$y=5x-1\\\\y-5x=-1$