+ vle. mathswatch. co. uk/vle/assignment/4864407/19730
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Jim and Alvin have a total of 360 Pokemon cards.
The ratio of the number of Jim's cards to the number of Alvin's cards is 7:2
Alvin buys some cards from Jim.
The ratio of the number of Jim's cards to the number of Alvin's cards is now 7:5
How many cards does Alvin buy from Jim?
You must show all your working.​

x = -2

y = 848

step-by-step explanation:

plug in the numbers

the answer would be 484

step-by-step explanation:

just multiply 0.484 times 1,000 (formula)

what's the question?

step-by-step explanation:

there is no question.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: