Solve this equation
3x+5y=26
2x-y=13

Answers

Answer 1

Answer: Okey I help you

3x+5y=26
5*/2x-y=13

3x+5y=26
10x-5y=65
+------------------

13x= 91
x=7

3x+5y=26
3*7+5y=26

5y=5

y=1 ,,

Hope it helps :))

Given that

At a local hospital, 35 babies were born.

There are 23 were boys.

We have to determine

What percentage of the newborns were boys?

According to the question

At a local hospital, 35 babies were born.

There are 23 were boys.

Then,

The percentage of the newborns were boys is determined by,

$\rm Percentage \ of \ new \ born \ boys = (Total \ number\ of \ boys * 100)/(Total \ number \ of \ babies)$

Substitute all the values in the formula.

$\rm Percentage \ of \ new \ born \ boys = (Total \ number\ of \ boys * 100)/(Total \ number \ of \ babies)\n\n\rm Percentage \ of \ new \ born \ boys = (23 * 100)/(35)\n\n\rm Percentage \ of \ new \ born \ boys = (2300)/(35)\n\n\rm Percentage \ of \ new \ born \ boys = 65.71 \ percent$

Hence, the percentage of newborns who were boys is 65.71%.

To know more about Percentages click the link given below.

brainly.com/question/8009466

so the fraction would be 23/35 are boys. If you do the division (23 ÷ 35) the answer is around 0.657.

That converted into a percentage (×100) is 65.7%

Which ordered pair is the best estimate for the solution of the system of equations? y=3/2x+6y=1/4x−2

(−7,−3.5)

(−6,−3)

(−7,−4)

(−6.5,−3.5)

Answers

The answer is (-6.5,-3.5)

The local pre-school ordered all new bicycles and tricycles for the new school year. Each bicycle and tricycle is shipped in its own box. Oddly, the manufacturer shipped all of the wheels in a separate box. If there are 16 boxes of bicycles/tricycles total and 45 wheels total, how many tricycles were ordered?please don't just put an answer i need an explanation too

Answers

there are 16 boxes total, and 45 wheels total.

we know that each bicycle/tricycle is in it's own box.
i'm going to use the variable "b" for bicycle and "t" for tricycle

b + t = 16
(because b is the amount of bicycles and t is the amount of tricycles)

now we know that there are 45 wheels total.
there are 2 wheels for a bicycle and 3 wheels for a tricycle

2b + 3t = 45

now we have a system of equations
b + t = 16
2b + 3t = 45

You can solve this multiple ways, but I'm going to use substitution.
b + t = 16 can also be written as b = 16 - t (if you subtract both sides by t)
then we can substitute this b = 16 - t into the other equations

2(16 - t) + 3t = 45

32 - 2t + 3t = 45
32 + t = 45
t = 13

now you can plug that back into the original equations

b + 13 = 16
b = 3

2b + 3(13) = 45
2b + 39 = 45
2b = 6
b = 3

If you have any more questions, feel free to ask!

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