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algol [13]
4 years ago
14

A question that is simple

Mathematics
2 answers:
Harlamova29_29 [7]4 years ago
8 0

Answer:

first answer

Step-by-step explanation:

sergij07 [2.7K]4 years ago
5 0

Answer:

y= -x^2+2

y=x-4

hope it help

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Suppose a railroad rail is 4 kilometers and it expands on a hot day by 15 centimeters in length. Approximately how many meters w
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3 0
3 years ago
Rewrite y = -(x + 2)2 – 5 in standard form.
xenn [34]

Answer:

y = - x² - 4x - 9

Step-by-step explanation:

Given

y = - (x + 2)² - 5 ← expand (x + 2)² using FOIL

  = - (x² + 4x + 4) - 5 ← distribute parenthesis by - 1

  = - x² - 4x - 4 - 5 ← collect like terms

   = - x² - 4x - 9 ← in standard form

8 0
4 years ago
PLEASE HELP , TRYING TO BE ON HONOR ROLL !
borishaifa [10]

Option A

The solution is (0, \frac{-1}{4})

<em><u>Solution:</u></em>

<em><u>Given system of equations are:</u></em>

3x + 6y = 1 ------ eqn 1

x - 4y = 1 ------ eqn 2

We have to find solution to system of equations

We can use substitution method

From eqn 2,

x = 1 + 4y -------- eqn 3

Substitute eqn 3 in eqn 1

3(1 + 4y) + 6y = 1

3 + 12y + 6y = 1

18y = 1 - 3

18y = -2

Divide both sides by 18

y = \frac{-2}{18}\\\\y = \frac{-1}{4}

Substitute the above value of y in eqn 3

x = 1 + 4 \times \frac{-1}{4}\\\\x = 1-1\\\\x = 0

Thus solution is (0, \frac{-1}{4})

8 0
3 years ago
Question 6
netineya [11]

Answer:

y= 84

Step-by-step explanation:

y = kx

where k is the constant

k = y/x = 91/13 = 7

the value of Y when x= 12

y = kx =7(12)

y =84

4 0
3 years ago
Need math help. Thanks in advance.
Mademuasel [1]
9. D because it fits the description when it is graphed. 
11. D because it has the correct vertex, which is (1.5, 4.75). 
12. f(x)=-4(x-2)²+16 works with the table and provided graph!
13. 0 isn't a zero for f(x), so B is correct (the zeros are 1/2 and 4). 
14. The width is about 3.831. 
15. The answer is B because the equation for a parabola in this form is: 
      f(x) = (x - r₁)(x - r₂)

Every one of these except for 15 was solved using desmos, a graphing calculator. 

Hope this helps!
7 0
3 years ago
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