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3 years ago

There is a bag with only red marbles and blue marbles.

1 answer:

7 0

Hello I hope I can help you with this!!

EXPLANATION:
first we work out what all the marbles equal which is 9/9=63

Then we work out what 1/9 of the marbles are! Which is 1/9= 7 marbles!!

Then we work out what 5/9 of them are! Which is 5/9= 35 marbles

Then now we work out 4/9 which is our RED marbles! We do 4 times 7 which equals 28 red marbles!!

if you want to check to add the two numbers and they equal 63!

ANSWER= 28 red marbles

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Help on math please!

DedPeter [7]

(13•4) + (3•8) +3 = 79
The total cost is $79

6 0

3 years ago

A rectangle with sides measuring x in. and 4x-1 in. has an area of 663in.^2. What are the dimensions of the rectangle?

serious [3.7K]

9514 1404 393

Answer:

13 in by 51 in

Step-by-step explanation:

The area is the product of the dimensions, so is ...

663 = x(4x -1)

4x^2 -x -663 = 0 . . . . . . subtract 663 to put in standard form

Using the quadratic formula, we can find the solutions.

x = (-(-1) ±√((-1)^2 -4(4)(-663)))/(2(4))

x = (1 ± √10609)/8 = (1 ±103)/8

Only the positive solution is of any use in this problem, so ...

x = 104/8 = 13

4x-1 = 4(13)-1 = 51

The dimensions of the rectangle are 13 inches by 51 inches.

I find it easiest to solve these using a graphing calculator.

8 0

3 years ago

Why does the equation (x-4)^2-28=8 have two solutions?

Aliun [14]

<h3>Answer:</h3>

For your first answer it is because they are two different ways to solve the equation

<h3>Step-by-step explanation:</h3>

For Example!

<h2>Solution 1:</h2>

(x-4)² – 28 = 8The 8 is positive making it a different equation (this is like absolute value). (I am assuming you know the answer to the probelm)

<h2>Solution 2:</h2>

(x-4)² – 28 = -8

The 8 could be negative meaning that when you add the 28 to the right side it is -8+28 which will be a negative!

<h3>I hope this helps</h3><h2>IF IT DOES HELP PLEASE GIVE IT A BRAINLIEST!</h2>

4 0

2 years ago

Read 2 more answers

I have a problem from precalculus cosx/1-tanx +sinx/1-cosx =cosx+sinx prove the identity

vovangra [49]

Answer:

see attachment

Step-by-step explanation:

7 0

3 years ago

In the morning before school, Janine spend 1/10 hour making the bed,1/5 hour getting dressed and 1/2 hour eating breakfast. What

padilas [110]

Answer:

4/5 hour . . . . 48 minutes

Step-by-step explanation:

In hours, the total time is ...

... 1/10 + 1/5 + 1/2 = 1/10 + 2/10 + 5/10

... = (1+2+5)/10 = 8/10

... = 4/5

____

You can have a calculator add these numbers for you. Most will report the result as a decimal. There are fraction calculators on-line, if your graphing calculator does not have a fraction display mode.

If you want minutes, multiply the fraction (or decimal) by 60 minutes.

7 0

3 years ago