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3 years ago

Please help me and please explain the answer:))

Mathematics

2 answers:

hodyreva [135]3 years ago

4 0

Answer:

3rd one

Step-by-step explanation:

Mazyrski [523]3 years ago

4 0

The answer is the 3rd one. In negative numbers bigger numbers are smaller. For example, -8 is > than -10.

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Find three consecutive odd numbers whose sum is 1875.

masya89 [10]

Answer:

smaller number = 623

middle number = 625

larger number = 627

Step-by-step explanation:

Variable: X = smallest number

If these numbers are consecutive and odd, then the numbers would be:

x, x+2, x+4

x + (x + 2) + (x + 4)= 1875

3x + 6 = 1875

3x = 1869

x = 623

x + 2 = 625

x + 4 = 627

Check:

623 + 625 + 627 = 1875

4 0

3 years ago

In how many ways can the letters in the word 'Illinois' be arranged?

xenn [34]

Answer:

The numbers of ways to permute letters of the word Illinois if the two Ls must be consecutive is 7.

7 0

3 years ago

A network charges $855,000 for a 30-second ad during a major televised sports event. The advertisers must purchase a minimum of

blondinia [14]

2,565,000 is the answer

7 0

3 years ago

What is the equation of the quadratic graph with a focus of (3, 1) and a directrix of y = 5?

telo118 [61]

Answer:

$f(x)=-\frac{1}{8}(x-3)^2+3$

Step-by-step explanation:

We want to find the equation of the parabola with a focus of $(3,1)$ and directrix $y=5$ .

Considering the directrix, the quadratic graph must open downwards.

The equation of this parabola is given by the formula,

$(x-h)^2=4p(y-k)$ , where $(h,k)$ is the vertex of the parabola.

The axis of this parabola meets the directrix at $(3,5)$ .

Since the vertex is the midpoint of the focus and the point of intersection of the axis of the parabola and the directrix,

$h=\frac{3+3}{2}=3$ and $k=\frac{5+1}{2}=3$ .

The equation of the parabola now becomes,

$(x-3)^2=4p(y-3)$ .

Also $|p|$ is the distance between the vertex and the directrix.

$|p|=2$

This implies that $p=-2\:or\:2$ .

Since the parabola turns downwards,

$p=-2$ .

Our equation now becomes,

$(x-3)^2=4(-2)(y-3)$ .

$(x-3)^2=-8(y-3)$ .

We make y the subject to get,

$y=-\frac{1}{8}(x-3)^2+3)$ .

This is the same as

$f(x)=-\frac{1}{8}(x-3)^2+3)$ .

4 0

3 years ago

0.09X+4=4.9 I need to solve the unknown

saul85 [17]

Answer:

the answer should be x=10

5 0

3 years ago

Please help me and please explain the answer:)) ​

Please help me and please explain the answer:))