Answer:
0.8
Step-by-step explanation:
Answer:
7 students have neither blue nor brown hair.
Step-by-step explanation:
Answer:
<h2>Bibi ate 6.3 pounds of food, approximately.</h2><h2>Rexy ate 5.7 pounds of food, approximately.</h2>
Step-by-step explanation:
1. What is this situation about?
The situation described is about the amount of food those dogs eat, and its relation with their weights.
2. What are the quantities in this situation?
The quantities are aboth the weight of each dog, and the number of pounds of dog food.
3. What mathematical questions could we ask?
We could ask the pounds of food each dog eats, in proportion with their weights.
4. Answer the question.
To answer that question, we just need to form a proportion.
![\frac{8}{10.5}=\frac{12-x}{x}](https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B10.5%7D%3D%5Cfrac%7B12-x%7D%7Bx%7D)
Where
is the total pounts Rexy ate, and
is the total pounts Bibi ate.
![8x=126-10.5x\\8x+10.5x=116\\18.5x=116\\x=\frac{116}{18.5} \approx 6.3](https://tex.z-dn.net/?f=8x%3D126-10.5x%5C%5C8x%2B10.5x%3D116%5C%5C18.5x%3D116%5C%5Cx%3D%5Cfrac%7B116%7D%7B18.5%7D%20%5Capprox%206.3)
Therefore, Bibi ate 6.3 pounds of food, approximately.
Then, ![12-x = 12-6.3 = 5.7](https://tex.z-dn.net/?f=12-x%20%3D%2012-6.3%20%3D%205.7)
Which means, Rexy ate 5.7 pounds of food, approximately.
Answer:
15 x 5 would come first
Step-by-step explanation:
PEMDAS
first you do parenthesis, and then multiplication so you would do the multiplication inside of the ( ) first !
Step-by-step explanation:
a) 24.7×52.3=1291.81
On rounding off to 3 significant digits we get
1290
b)
![\sqrt{ {42}^{2} - {28}^{2} }](https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%7B42%7D%5E%7B2%7D%20-%20%20%7B28%7D%5E%7B2%7D%20%20%7D%20)
![\sqrt{1764 -784 } = \sqrt{980}](https://tex.z-dn.net/?f=%20%5Csqrt%7B1764%20-784%20%7D%20%20%3D%20%20%5Csqrt%7B980%7D%20)
=31.304951
On rounding off to 5 significant figures we get
=31.305
c)
![\sqrt[3]{78} = 4.27265](https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B78%7D%20%20%3D%204.27265)
On rounding off to 2 significant figures we get
=4.3
Hence required answers
a)1290
b)31.305
c)4.3
I hope it helped you