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4 years ago

Ben is 4 times as old as Ishaan and is also 6 years older than Ishaan.

1 answer:

4 0

Let x be the age of Ben and y be the age of Ishaan.
x= 4y... Equation (1)
x= y + 6... Equation (2)
Subtract the 2 equations
(1) - (2) : x-x= 4y - (y+ 6)
0 = 4y - y - 6
0 = 3y - 6
3y = 6
y = 2
So Ishaan is 2 years old
Substitute y = 2 in equation (1)
x = 4(2)
x = 8
So Ben is 8 years old and Ishaan is 2 years old.

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The sum of two numbers is 72 the greater number is 8 more than the smaller number which equation can be used to solve for the sm

kobusy [5.1K]

Answer:

let x is the smaller number

bigger number is x + 8

The sum of two numbers is 72

x + (x+8) = 72

answer

x + (x + 8) = 72

Step-by-step explanation:

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3 years ago

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4 years ago

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2[18-(5+9)÷7]<br>show how you did it

Alex777 [14]

Order of operations

PEMDAS
do parntheases
then exponents
then mutiply or divide, whichever coms first
then addd or subtract, whichever comes first

so

when doing parenthases, simplify innermost parenthsees first

so

2(18-(5+9)/7)
innermost is (5+9)=14

now we gots
2(18-(14)/7)
we can distribute or multiply the invisible -1 in front of the 14

2(18-14/7)
now divide because division comes before adition
remember that it is -14/7, not just 14/7 because the negative is part of the 14

2(18-2)

now simplify parenthasees
18-2=16
so

2(16)
multiply
32

the result is 32

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3 years ago

The sum of 4 times a number and 9 is equal to 8. Use the variable b for the unknown number.

Alexxandr [17]

Answers
4b+9=8
This is the required statement

8 0

2 years ago

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Two waiters at a cafe each served 10 large fruit smoothies. The amount in each large smoothie is shown below. Witch Waiter's smo

joja [24]

Answer:

Waiter’s B Large Smoothies showed less variability.

Step-by-step explanation:

First, we have to find the mean for Waiter A’s and Waiter B’s Large Smoothies.

1) Mean

Waiter A

19.1 + 20.1 + 20.9 + 19.6 + 20.9 + 19.5 + 19.2 + 19.4 + 20.3 + 20.9 = 199.9

199.9 / 10 = 19.99

Waiter B

20.1 + 19.6 + 20.0 + 20.5 + 19.8 + 20.0 + 20.1 + 19.7 + 19.9 + 20.4 = 200.1

200.1 / 10 = 20.01

Now, we have to use the Mean Absolute Deviation (MAD) to find which waiter’s smoothies showed less variability.

Waiter A

I19.99 - 19.1I = 0.89

I19.99 - 20.1I = 0.11

I19.99 - 20.9I = 0.91

I19.99 - 19.6I = 0.39

I19.99 - 20.9I = 0.91

I19.99 - 19.5I = 0.49

I19.99 - 19.2I = 0.79

I19.99 - 19.4I = 0.59

I19.99 - 20.3I = 0.31

I19.99 - 20.9I = 0.91

0.89 + 0.11 + 0.91 + 0.39 + 0.91 + 0.49 + 0.79 + 0.59 + 0.31 + 0.91 = 6.3

6.3 / 10 = 0.63

Waiter B

I20.01 - 20.1I = 0.09

I20.01 - 19.6I = 0.41

I20.01 - 20.0I = 0.01

I20.01 - 20.5I = 0.49

I20.01 - 19.8I = 0.21

I20.01 - 20.0I = 0.01

I20.01 - 20.1I = 0.09

I20.01 - 19.7I = 0.4

I20.1 - 19.9I = 0.2

I20.1 - 20.4I = 0.3

0.09 + 0.41 + 0.01 + 0.49 + 0.21 + 0.01 + 0.09 + 0.4 + 0.2 + 0.3 = 2.2

2.2 / 10 = 0.22

Now, we just have to compare those numbers.

0.63 > 0.22

So, Waiter B’s smoothies show less variability.

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3 years ago