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Oduvanchick [21]
3 years ago
13

In a paragraph explain the "system of equations"​

Mathematics
1 answer:
MakcuM [25]3 years ago
4 0
A "system" of equations is a set or collection of equations that you deal with all together at once. Linear equations (ones that graph as straight lines) are simpler than non-linear equations, and the simplest linear system is one with two equations and two variables.
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Find the x-intercept of the parabola of with vertex (1,20) and the y-intercept (0,16). write your answer in this form: (x1,y1),(
svetoff [14.1K]
I assume that the parabola in this particular problem is one whose axis of symmetry is parallel to the y axis. The formula we're going to use in this case is (x-h)2=4p(y-k). We know variables h and k from the vertex (1,20) but p is not given. However, we can solve for p by substituting values x and y in the formula with the y-intercept:

(0-1)^2=4p(16-20)

Solving for p, p=-1/16.

Going back to the formula, we can finally solve for the x-intercepts. Simply fill in variables p, h and k then set y to zero:

(x-1)^2=4(-1/16)(0-20)
(x-1)^2=5
x-1=(+-)sqrt(5)
x=(+-)sqrt(5)+1

Here, we have two values of x

x=sqrt(5)+1 and
x=-sqrt(5)+1

thus, the answers are: (sqrt(5)+1,0) and (-sqrt(5)+1,0).
5 0
3 years ago
Please help me find y and show work/steps. I don't know how to do it
trasher [3.6K]

We will check if y and 60cm are parallel.

If the lengths 28cm, 56cm and 15cm, 30cm are in proportion, then y and the segment 60cm are parallel.

\dfrac{56}{28}=\dfrac{30}{15}\\\\2=2\qquad CORRECT!

OK. We know: y and 60cm are parallel. Therefore we have equation:

\dfrac{y}{28+56}=\dfrac{60}{56}\\\\\dfrac{y}{84}=\dfrac{15}{14}\qquad|\text{cross multiply}\\\\14y=15\cdot84\qquad|\text{divide both sides by 14}\\\\y=90cm

<h3>Answer: y = 90 cm.</h3>
5 0
3 years ago
Read 2 more answers
Consider the quadratic function Y= -(x-3)^2+4
wlad13 [49]

Answer:

-(x^2-2*x*3+3^2)+4=-x^2+6x-9+4=x^2+6x-5

Step-by-step explanation:

4 0
3 years ago
A body builder consumed 4,400 calories yesterday. Today, he consumed 3,600 calories. What is the percent decrease in number of c
Ierofanga [76]
22.22222222222222 is the answer you can simplify it by saying 22.222...
6 0
3 years ago
At a science competition, 25 problems were given. Each correct answer earned 4 points, and 2 points were deducted for each incor
Ket [755]
4*25= 100 (total points) 
x + y = 24 4x-2y = 66
since he only answered 24 questions 
therefore max he can get is 96
x + y = 24
4x-2y = 66 from first equation,
 y = 24-x plug that in second equation :
4x - 2(24-x) = 66
4x - 48 + 2x = 66 
 6x = 114
x = 19

3 0
3 years ago
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