zivicion
04.08.2020 •
Mathematics
1. an alloy contains zinc and copper in the ratio of 7:9 find weight of copper of it had 31.5 kgs of zinc.
2. compare the following ratios
i) 2:3 and 4:5
ii) 11:19 and 19:21
iii) ½ : ⅓ and ⅓ : ¼
iv ) 1⅕ : 1⅓ and ⅖ : 3/2
v) if a : b = 6:5 and b:c = 10:9, find a:c
vi) if x : y = ⅙:⅛ and y : z = ⅛: ⅒, find X : z
sorry many questions
Solved
Show answers
More tips
- S Sport When is the Champions League final?...
- H Health and Medicine Is Folic Acid a Necessary Vitamin?...
- W Work and Career How to Start Your Own Business: Tips and Recommendations...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
Answers on questions: Mathematics
- M Mathematics I have never understood these. Help....
- M Mathematics 3. Which of the following quadratic equations has no solution? A) 0 = −2(x − 5)2 + 3 B) 0 = −2(x − 5)(x + 3) C) 0 = 2(x − 5)2 + 3 D) 0 = 2(x + 5)(x + 3)...
- M Mathematics An archer has a 20% chance of hitting the bullseye on a target. find the binomial distribution table for hitting the bullseye in 4 shots....
- M Mathematics Caleb wants to rent a kayak. kayak rental cost 14.50 for a half hour.if caleb rents a kayak for one hour and forty-five minutes. how much will it cost...
- B Business richard, age 45, is married with two children in high school. he estimates that his average annual earnings over the next 20 years will be $60,000. he estimates that...
- H History Kiowa men often decorated the outsides of their tipis with images of... 1. celestial bodies. 2. important battles. 3. sacred porcupines. 4. large buffalo....
- M Mathematics Determine whether rolle s theorem can be applied to the function on the given interval; if so, find the value(s) of c guaranteed by the theorem. (enter your answers as...
- M Mathematics Last year Miranda was 60 inches tall. This year she is 63 inches tall. What is the percent increase in her height? is it 60% is it 5% is it 6.3% or is it 95%...
Ответ:
Step-by-step explanation:
Question (1). An alloy contains zinc and copper in the ratio of 7 : 9.
If the weight of an alloy = x kgs
Then weight of copper =
=
And the weight of zinc =
=
If the weight of zinc = 31.5 kg
31.5 =
x =
x = 72 kgs
Therefore, weight of copper =
= 40.5 kgs
2). i). 2 : 3 =
4 : 5 =
Now we will equalize the denominators of each fraction to compare the ratios.
=
Since,
Therefore, 4 : 5 > 2 : 3
ii). 11 : 19 =
19 : 21 =
By equalizing denominators of the given fractions,
And
Since,
Therefore, 19 : 21 > 11 : 19
iii).
=
Now we equalize the denominators of the fractions,
And
Since
Therefore, will be the answer.
IV).
Similarly,
By equalizing the denominators,
Similarly,
Since
Therefore,
V). If a : b = 6 : 5
And b : c = 10 : 9
Since a : b = 12 : 10
And b : c = 10 : 9
Since b = 10 is common in both the ratios,
Therefore, combined form of the ratios will be,
a : b : c = 12 : 10 : 9
Ответ:
45w
Step-by-step explanation:
Negative and Negative makes a positive