A bag of marbles contains 15 blue marbles and 25 green marbles. Which of the

Mathematics

1 answer:

d1i1m1o1n [39]2 years ago

6 0

Answer:

5/8

Step-by-step explanation:

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Help Please!? Thank You!

swat32

A. left 2 units

the vertex form of a parabola is
y = a(x-h)^2 + k
(h,k) is the point of the vertex

since h is -2 in (x+2)^2
the function is shifted 2 units left

3 0

2 years ago

HELP!

maksim [4K]

Part A

$4x^2 -7x-15=0\\\\(4x+5)(x-3)=0\\\\x=-\frac{5}{4}, 3$

So, the x-intercepts are $\boxed{\left(-\frac{5}{4}, 0 \right), (3,0)}$

Part B

The vertex will be a minimum because the coefficient of $x^2$ is positive.

The x-coordinate of the vertex is $x=-\frac{-7}{2(4)}=\frac{7}{8}$

Substituting this back into the function, we get $f\left(\frac{7}{8} \right)=4\left(\frac{7}{8} \right)^2 -7\left(\frac{7}{8} \right)^2 -15=-\frac{289}{16}$

So, the coordinates of the vertex are $\boxed{\left(\frac{7}{8}, -\frac{289}{16} \right)}$

Part C

Plot the vertex and the x-intercepts and draw a parabola that passes through these three points.

The graph is shown in the attached image.

7 0

2 years ago

Which of the following is the quotient of the rational expression (x-2/x+3) divided by (2/x)

zloy xaker [14]

Answer:

(x²-2x)/(2x+6)

Step-by-step explanation:

When you are asked to divide two fractions just do keep-change-flip. Keep the first fraction, change the ÷ to x and flip the second fraction upside down. So the problem becomes ((x-2)/(x+3)) times (x/2). Then just multiply numerators and multiply denominators.

6 0

3 years ago

Read 2 more answers

Prove that the expression A + B - C is equivalent to the expression C - B - A if A = 2x - 1, B = 3x + 1 and C = 5x.

zepelin [54]

Answer:

both are equal is 0

Step-by-step explanation:

After substituting, the answer is 0 to both

3 0

2 years ago

Two weeks and 5 weeks when will they meet again