3 years ago

A teacher had 18 red pens if the ratio of red pens to blue pens she owned was 3:5 how many pens did she have in total

2 answers:

7 0

Answer: 48 pens in total.
Explanation: to find ratio of 2 things is simple. For example here it is says “red pens to blue pens” so that means every 3 red pens = 5 blue pens.

babymother [125]3 years ago

3 0

Answer:

48 pens in total.

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The sum of two numbers is 62, and their difference is 8. What are the<br> numbers?

Marina CMI [18]

Answer: 35 and 27

Step-by-step explanation:

We can solve this by using a system of equations

x will be the first number while y will be the second

$x+y=62$

This equation means the two numbers will add to get 62

$x-y=8$

This equation means when subtracted the two numbers will have the difference of 8.

Now I will solve by elimination

$x+y=62\\\\+x-y=8\\2x=70$

When adding the two equations why was eliminated so now we can find the value of x

$2x=70\\\frac{2x}{2} =\frac{70}{2} \\x=35$

Now sub in x into one of the original equations to find the value of y

$35+y=62\\35-35+y=62-35\\y=27$

6 0

3 years ago

Factorise x squared + 12 x + 35

Ksenya-84 [330]

5 and 7 add to make 12 and multiply to make 35 so those are the numbers that will be used:
(x+5)(x+7)

Hope this helps :)

5 0

4 years ago

Dora took 10 hours to walk a 30 mile trail how long did it take her to walk 9 miles going the same speed?

Brrunno [24]

3 hours
$3 \times 10 = 30 \: so \: it \: is \: 3 \: mph \: 3 \times 3 = 9$

6 0

4 years ago

The cost to rent a hall for the prom is $400 and $30 per person for the meal. This can be modelled by the equation C=400+30x, wh

Ugo [173]

Answer:

320 students

Step-by-step explanation:

10,000=400+30x

10,000-400

9600=30x

9600/30

320=x

7 0

3 years ago

If one box of cookies equal 9 cookies, then 2 boxes equals 18 cookies. How many does 3 boxes plus 2 equal equal to?

anygoal [31]

Answer:

29 cookies

Step-by-step explanation:

x=9,2x=18,3x+2=3(9)+2=29

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3 years ago