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3 years ago

9

Solve for D 7.830 = 3.915(1.106)D

1 answer:

PilotLPTM [1.2K]3 years ago

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John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

<em>Find the value of x</em>

$x=5(8)=40$

<em>Find the value of z</em>

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

7 0

3 years ago

five friends went out to dinner. each paid 13.75 for the meal including a 7 percent sales tax. what was the total cost of meal b

Sphinxa [80]

Answer:

Step-by-step explanation:

86

8 0

2 years ago

What is the equation of the line that passes through the point (4.11) and is perpendicular to the line with the following equati

ollegr [7]

Answer:

the answer is A ..............

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1 year ago

Evaluate [(30 + 6) − 32] ÷ 9 ⋅ 2 1.5 6 6.7 10

Andrews [41]

Use PEMDAS:

[(30+6) -3^2] / 9* 2

= (36 -9)/ 9* 2

= 27/9* 2

= 3*2

= 6

The final answer is 6~

3 0

2 years ago

Read 2 more answers

How much water do you need to add to make each concentration?<br> 1% sugar syrup using 12 g sugar

yulyashka [42]

Answer:

1188 grams of water

Step-by-step explanation:

x is the grams of water

so total is 12+x grams

sugar/total is 12/12+x

and 1% ratio is 12/12+x=1/100

so x would be 1188 grams of water.

6 0

2 years ago