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2 years ago

John has twice as many brothers as Bob. If Bob has b brothers, how many brothers does John have?

2 answers:

6 0

2x. Use variables. "X" is our variable. Bob has x brothers. If john has 2 times as many you multiply so it would equal 2x

Mashutka [201]2 years ago

4 0

Let, J = John and B = Bob

2J = B

Because you didn't give me a number we are making an expression

2J = b

Make J = 1

J = b/2

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Solve the System of Equations

soldi70 [24.7K]

Answer:

Equations: $x+y=80\,,\,2x+4y=216\,\,$

number of chickens = 52

number of goats = 28

Step-by-step explanation:

Given: A small ranch has chickens and goats

Total number of heads = 80

Total number of legs = 216

To find: number of chickens and goats

To draw: the graph

Solution:

Let x denotes number of chickens and y denotes number of goats.

According to the question,

$x+y=80\,\,(i)\\2x+4y=216\,\,(ii)$

From (i), put $x=80-y$ in (ii)

$2(80-y)+4y=216\\160-2y+4y=216\\2y=216-180\\2y=56\\y=\frac{56}{2}=28$

Put $y=28$ in equation (i)

$x+28=80\\x=80-28=52$

So,

number of chickens = 52

number of goats = 28

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6 0

3 years ago

2.2⋅10^6−4.3⋅10^5<br> I need help I am confused on the answer.

Tanzania [10]

1,770,000
find the first part of the equation (2200000) and then the second part (430000) and subtract

8 0

2 years ago

4x - 17 = 32 what is x

katrin [286]

X = 12.25 and I’m typing this to get to 20 characters

6 0

2 years ago

Read 2 more answers

A smart phone regularly sells for $180.00 but is on sale for 30% off. What is the amount of the discount?

pantera1 [17]

Answer:

$54

Step-by-step explanation:

The amount of the discount can be found by multiplying 180 by 0.3 which is 54.

If you also need to know the new total it would be $126 because

180 - 54 = 126

4 0

2 years ago

Lynne invested 35,000 into an account earning 4% annual interest compounded quarterly she makes no other deposits into the accou

storchak [24]

Hello!

Lynne invested 35,000 into an account earning 4% annual interest compounded quarterly she makes no other deposits into the account and does not withdraw any money. What is the balance of Lynne's account in 5years

Data:

P = 35000

r = 4% = 0,04

n = 4

t = 5

P' = ?

I = ?

We have the following compound interest formula

$P' = P*(1+\dfrac{r}{n})^{nt}$

$P' = 35000*(1+\frac{0,04}{4})^{4*5}$

$P' = 35000*(1+0,01)^{20}$

$P' = 35000*(1,01)^{20}$

$P' = 35000*(1.22019003995...)$

$P' \approx 42,706.66$

So the new principal P' after 5 years is approximately $42,706.66.

Subtracting the original principal from this amount gives the amount of interest received:

$P' - P = I$

$42,706.66 - 35000 = \boxed{\boxed{7,706.66}}\end{array}}\qquad\checkmark$

________________________

I Hope this helps, greetings ... Dexteright02! =)

4 0

2 years ago