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My name is Ann [436]
3 years ago
12

Stevie has some marbles

Mathematics
2 answers:
IgorC [24]3 years ago
6 0

Let the number of marbles Stevie has = x.

Given Freddie has twice as many marbles as Stevie

Number of marbles Freddie has = 2x.

Given Danny has 5 more marbles than Freddie .

Number of marbles Danny has = 2x+5.

In total they have 55 marbles

x+2x+2x+5=55

Adding like terms :

5x+5=55

Subtracting 5 both sides

5x=50

Dividing both sides by 5

x=10

Number of marbles Danny has = 2x+5=2(10)+5=20+5=25



Citrus2011 [14]3 years ago
4 0
Stevie has 25marbles
Freddie's has 25x2:50marbles
Danny has 50+5:55marbles
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Steve invested money in the stock market. In the first year, his stock increased 50%. He paid his stockbroker $350 and then lost
telo118 [61]

Answer:

Original amount invested = $3400 .

Step-by-step explanation:

Let the original investment of Steve = $x

Stock increased in the first year = 50% of amount invested

Therefore total amount after one year = x + 0.5x = 1.5x

Commission paid to the stock broker = $350

Amount lost by him = $400

Amount withdrawn by him = $300

Total amount decreased from the amount after 1 year

= 1.5x - (350 + 400 + 300)

= 1.5x - 1050

This remaining amount is doubled, so the final amount

= 2(1.5x - 1050)

= 3x - 2100

This final amount is equal to $8100

3x - 2100 = 8100

3x = 8100 + 2100

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8 0
3 years ago
Which set of ordered pairs is linear?
Aleks [24]

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Step-by-step explanation:

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2 years ago
Maggie’s brother is three years younger than twice her age. The sum of their ages is 24. How old is maggie?
JulsSmile [24]

To solve this problem, we must set up a system of equations. In this case, let's let Maggie's age be represented by the variable m and her brother's age be represented by the variable b. We are told that the sum of their ages is 24, which gives us our first equation: m + b = 24. We can construct our next equation from the first sentence of given information: b = 2m - 3. This makes our system of equations:

m + b = 24

b = 2m - 3

To solve, we are going to substitute the value for b in terms of m given by the second equation into the first equation for the variable b.

m + b = 24

m + 2m - 3 = 24

To simplify, we must first combine the variable terms on the left side of the equation using addition.

3m - 3 = 24

Next, we should add 3 to both sides of the equation to get the variable term alone on the left side of the equation.

3m = 27

Finally, we should divide both sides by 3 in order to get the variable m alone.

m = 9

Therefore, Maggie is 9 years old (using the first equation and substituting in this value you can find that her brother is 15 years old).

Hope this helps!

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