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kakasveta [241]

2 years ago

6

One month ruby worked six hours more than Isaac and svetlana worked four times as much hours as ruby together they worked 126 ho

urs find the number of hours each person work

1 answer:

natulia [17]2 years ago

4 0

R=I+6 S=4R I

I+(I+6)+4(I+6)=126

Basic algebra (I dont know how to show it) leaves you with: 6I = 90, divide both sides by 6 and I=15

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Pls help in a middle of an exam

KIM [24]

Answer:

$\frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

Step-by-step explanation:

$\frac{2x}{4x^2-9} + \frac{3}{2x^2+x-3}$ can be simplified to:
$\frac{2x}{(2x-3)(2x+3)}+\frac{3}{(2x+3)(x-1)}$

Make them have common denominators so:
$\frac{(2x)(x-1) +3(2x-3)}{(2x-3)(2x+3)(x-1)}$

Simplify:
$\frac{2x^2-2x+6x-9}{(2x-3)(2x+3)(x-1)} = \frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

I don't think you can simplify that fraction further so that's the answer.

3 0

1 year ago

A spherical cantaloupe is cut in half. The visible cross-section has an area of 5252 in2. The volume of the cantaloupe is _____

artcher [175]

Answer:

V = 286319.465 cm3

Step-by-step explanation:

First, you have to find the radius to be able to find the volume of a sphere.

The equation for the area of a circle is pi r^2 so you have to so some algebra.

5252 = pi r ^2

5252/pi = r^2

1671.76352 = r^2

sqrt(1671.76352) = r

r = 40.8872048

then you do the equation for the volume of a circle which is 4/3 pi r^3

4/3 pi (40.8872048)^3

4/3 pi 68353.7373

4/3 214739.599

286319.465

V = 286319.465 cm3

6 0

2 years ago

HELP! What is the solution to the following system of equations?

tatuchka [14]

Answer:

it is 2,4

Step-by-step explanation:

The point that they meet is 2,4 . It means X+ is 2 and Y+ is 4 .

You can write a as their meet point . you should answer like this a(2,4) .

4 0

2 years ago

Use the rules of inference to prove the conclusion r given (all 1,2,3 and 4) the four premises listed below. Write your solution

aniked [119]

Answer:

attached below

Step-by-step explanation:

Applying the rule of logical equivalences

attached below is a detailed solution ( written as a numbered sequence of statements )

3 0

1 year ago

Write the equation of the parabola that has the vertex at point (2,7) and passes through

Anton [14]

Answer:

$f(x) = \frac{4}{3} (x - 2) ^{2} + 7$

Step-by-step explanation:

the answer is :- .

$f(x) = \frac{4}{3} (x - 2) ^{2} + 7$

6 0

1 year ago