Three hundred million eight hundred thousand
You need to put the x or y value in the other equation ;
For example excersize a
It given that
Y=x^2+3x-1
Then you put it on the first equation :
x+x^2+3x-1=4
And then you solve it
x+x^2+3x-1-4=0
4x+x^2-5=0
We will make the order to seem easier
x^2+4x-5=0
x1=-5
x2=1
Then you put the x1,2 that you found on the second equation :
y=(-5)^2+3*(-5)-1=9
y=1^2+3*1-1=3
For summary :
x1=-5
x2=1
y1=9
y2=3
65% of the toy store is covered in lights. To convert a percentage to a decimal, simply divide it by 100 - 65/100=0.65. To convert a decimal to a fraction, you simply write it as (number*10^(number of digits after the decimal point))/10^(number of digits after the decimal point) Since there are 2 digits after the decimal place, we have
0.65*10²/10²=65/100. Noticing that both 65 and 100 are multiples of 5, we can divide both of them by 5 to get 13/20
Another way to do this is to go from a percentage to a fraction. For this, you simply take the numbers and divide it by 100. For 65%, we have 65/100=13/20
Feel free to ask further questions!
First make the equation:
1. x
2. 3x
x + 3x = 48
Now solve it:
x + 3x = 48
4x= 48
x=12
Now plug in x
1. x = 12
2. 3x = 36
So Kayla sold 12 blue t-shirts and 36 white t-shirts.
A 190,900
(after the comma there is a 9 which makes it one hundred ninety thousand nine hundred 900 is greater than 90)
