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snow_tiger [21]
3 years ago
7

How much times will Alex need to walk to his school, which is 2 1/4 miles away from his house, if he would walk with the speed o

f 3mph?
(Show your work ^^)
Mathematics
1 answer:
DedPeter [7]3 years ago
4 0
Alex walks 3 miles per hour. So if he need to find how much time he will need to get to school, you just have to divide the distance from school by his miles per hour. 2.25/3 which equals 0.75. 0.75 is the percent of an hour he needs to walk 2.25 miles. To find the total minutes, multiply 0.75 by 60 to get 45. Alex takes 45 minutes to walk to school.
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25x89 divide by 12 then times it by 9
Soloha48 [4]

Answer:

1668.75

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the sum of the rational expressions below? X/4 + 3/5x
Andrew [12]

Answer:

The answer is  \frac{5x^2+12}{20x} .

Step-by-step explanation:

Given:

X/4 + 3/5x.

Now, to find the sum of the rational expressions.

\frac{x}{4} +\frac{3}{5x}

So, to solve it by adding:

\frac{x}{4} +\frac{3}{5x}

=\frac{5x\times x+3\times 4}{5x(4)}

=\frac{5x^2+12}{20x}

Therefore, the answer is  \frac{5x^2+12}{20x} .

4 0
3 years ago
Please do it in substitution method. Thanks.​
alina1380 [7]

Answer:  No solution

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

x - 3y = 2   →     x = 3y + 2

2x - 6y = 6

2(3y + 2) - 6y = 6        <em>substituted x with 3y+2</em>

6y + 4 - 6y = 6            <em>distributed 2 into 3y+2</em>

        4        = 6           <em>simplified (6y - 6y = 0)</em>

4 = 6 is a FALSE statement so there is NO SOLUTION

5 0
3 years ago
25. Tiffany deposited two checks into her account this month. One check was for $70 and the second was for $25. Her balance at t
Anna35 [415]

The first thing to do is to start with something not quite so

complicated, so you can get used to the ideas first.  But let's go

ahead with this one, to check your work.

Here's one way I write these to demonstrate how to think it through:

 (18/2){[(9 x 9 - 1)/ 2]-[5 x 20 - (7 x 9 - 2)]}

 \____/  \_________/               \_________/

    9  {[    80     / 2]-[5 x 20 -     61     ]}

        \______________/ \____________________/

    9  {       40       -           39         }

       \_______________________________________/

    9 *                  1

    \____________________/

               9

So you're correct, and your work was fine.  The only thing I did

differently was to evaluate 18/2 earlier, because nothing stood in its

way; I could have waited as you did.

What parentheses do is to contain a subexpression that has to be fully

evaluated before it can be used in any containing expression.  That's

why you work from the inside out: you can't use what's inside until

you evaluate it all, so you might as well start there.  But if you

forgot to, you'd still have a reminder.  Here's an example:

 2[(3 + 7)(3 - 2) - 3(2 + 2)]

If I didn't bother with the inside-out "rule", I  might just start

trying to evaluate at the left (paying attention to the order of

operations, of course): 2 times ... what?  Well, the second number in

that multiplication is the whole thing inside [...], so I have to put

it on hold until I do that.  So I focus on

 (3 + 7)(3 - 2) - 3(2 + 2)

Now I start that.  The first piece is (3 + 7), so I evaluate that

whole thing and get 10.  Now I have to multiply it by (3 - 2), so I

stop and evaluate that, which gives 1.  Now I can multiply 10 by 1 and

get 10.  So I keep going; I have to subtract something from that, but

since the next bit is a product, I have to do that first.  I'll have 3

times the next parenthesis; that's 3 times 4, so I have 12.  The

subtraction I put off is 10 - 12 = -2.

Now, this is what the whole [...] is, so I go back and do that last

multiplication:

 2*(-2) = -4


7 0
3 years ago
What is the greatest common factor of 49, 62 and 80? OA) 1 OE) 2 OC) 3 OD) 5​
madam [21]

Answer: A (1)

Step-by-step explanation:

The way to find a common factor is by dividing the given numbers by the largest possible multiple that still gives you a whole number

A

49/1=49

62/1=62

80/1=80

This is an option

B

49/2=24.5

62/2=31

80/2=40

This is not an option, 24.5 is not a whole number

C

40/3=16.333(repeating)

This is not an option, you are not given a whole number

D

49/4=12.25

This is also not an option, 12.25 is not a whole number

Answer

Our only possible answer is A-1

7 0
3 years ago
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