Answer:
it would be 910
Step-by-step explanation:
i just had a quiz with this on it
Answer:
(3*8)-6
Step-by-step explanation:
3 packs times 8 because 8 in each pack minus six because she gave away six of them. No equal sign because its an expression
Hope this helps!
Since the quadratic formula of ax^2+bx+c is
x=(-b+-(plus OR minus) sqrt (b^2-4ac))/2a, we can get that a is 1 (since 1*x^2 is x^2), b is 4, and c is -16, so x=(-4+-sqrt((-4)^2-4*1*(-16)))/2*1
= (-4+-sqrt(16-(-64)))/2=(-4+-sqrt(80))/2 which is either (-4+sqrt(80))/2 or
(-4-sqrt(80))/2. Since 80 is divisible by 4 (aka 2 squared), we can write sqrt(80) as 2*sqrt(20) as 4 goes into 80 20 times, getting (-4+2sqrt(20))/2 or
(4-2sqrt(20))/2, and crossing out the 2's we get (-2+sqrt(20)) or (-2-sqrt(20))
65.5 divided by 2.5=26.2
answer is choice D
Answer:
<u>1) 16.5.</u>
<u>2) 14.9.</u>
<u>3) 18.8.</u>
Step-by-step explanation:
First of all, let's refer to the formulas for calculating BMI:
![BMI=\frac{weight(kg)}{height^{2}(m) }=\frac{weight(lb)}{height^{2}(in) }](https://tex.z-dn.net/?f=BMI%3D%5Cfrac%7Bweight%28kg%29%7D%7Bheight%5E%7B2%7D%28m%29%20%7D%3D%5Cfrac%7Bweight%28lb%29%7D%7Bheight%5E%7B2%7D%28in%29%20%7D)
Taking into consideration that the weight and height we have are in kg's and cm, let's choose the first formula to simplify the calculations:
![BMI=\frac{weight(kg)}{height^{2}(m) }](https://tex.z-dn.net/?f=BMI%3D%5Cfrac%7Bweight%28kg%29%7D%7Bheight%5E%7B2%7D%28m%29%20%7D)
1. Maria Jose's weight is 20 kgs and her height is 110 cm. Get the BMI.
First, we need to convert the hight from cm to m:
![\frac{110cm}{100} =1.1m](https://tex.z-dn.net/?f=%5Cfrac%7B110cm%7D%7B100%7D%20%3D1.1m)
Calculate BMI:
![BMI=\frac{20(kg)}{1.1^{2}(m) }=\frac{20}{1.21} =16.5.](https://tex.z-dn.net/?f=BMI%3D%5Cfrac%7B20%28kg%29%7D%7B1.1%5E%7B2%7D%28m%29%20%7D%3D%5Cfrac%7B20%7D%7B1.21%7D%20%3D16.5.)
(Rewriting calculations):
20 / (1.1)²=
30 / 1.21 =
16.5.
2.Freya's weight is 30 kgs and her height is 142 cm. What is Freya's BMI?
First, we need to convert the hight from cm to m:
![\frac{142cm}{100} =1.42m](https://tex.z-dn.net/?f=%5Cfrac%7B142cm%7D%7B100%7D%20%3D1.42m)
Calculate BMI:
![BMI=\frac{30(kg)}{1.42^{2}(m) }=\frac{30}{2.0164} =14.9.](https://tex.z-dn.net/?f=BMI%3D%5Cfrac%7B30%28kg%29%7D%7B1.42%5E%7B2%7D%28m%29%20%7D%3D%5Cfrac%7B30%7D%7B2.0164%7D%20%3D14.9.)
(Rewriting calculations):
30 / (1.42)²=
30 / 2.0164 =
14.9.
3. Sam's weight is 50 kgs and his height is 163 cm. What is Sam's BMI?
First, we need to convert the hight from cm to m:
![\frac{163cm}{100} =1.63m](https://tex.z-dn.net/?f=%5Cfrac%7B163cm%7D%7B100%7D%20%3D1.63m)
Calculate BMI:
![BMI=\frac{50(kg)}{1.63^{2}(m) }=\frac{50}{2.6569} =18.8.](https://tex.z-dn.net/?f=BMI%3D%5Cfrac%7B50%28kg%29%7D%7B1.63%5E%7B2%7D%28m%29%20%7D%3D%5Cfrac%7B50%7D%7B2.6569%7D%20%3D18.8.)
(Rewriting calculations):
50 / (1.63)²=
50 / 2.6569 =
18.8.