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3 years ago

After Jessie gave $20 to his brother, he had $33 left. How much did Jessie have originally?

Mathematics

1 answer:

babymother [125]3 years ago

7 0

Answer:

Step-by-step explanation:

Total amount = Given to his brother + Amount left

20 + 33 = 53

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Pedro le dice a María si cambias los billetes de 10 € que tienes por billetes de 5 € y los billetes de 5 € por billetes de 10 €

Bad White [126]

Answer: Maria has 10 bills of 5€ and 10 bills of 10€.

She has a total of 150€.

Step-by-step explanation:

Let be "f" the number of 5€ bills that Maria has and "t" the number of 10€ bills that Maria has.

Set up a system of equations:

$\left \{ {{f+t=20} \atop {5f+10t=10f+5t}} \right.$

Use the Substitution method to solve the system of equations:

1. Solve for "f" from the first equation:

$f=20-t$

2. Substitute the equation obtained into the second equation and solve for "t".

Then:

$5(20-t)+10t=10(20-t)+5t\\\\100-5t+10t=200-10t+5t\\\\20t-10t=100\\\\t=\frac{100}{10}\\\\t=10$

3. Substitute the value of "t" into the equation $f=20-t$ and evaluate:

$f=20-10\\\\f=10$

Therefore, Maria has 10 bills of 5€ and 10 bills of 10 €.

So the total amount of money she has, is:

$Total=10(5)+10(10)=150$

She has a total of 150€.

5 0

4 years ago

Solve 6 - 2x = 3<br><br> How do I do this?

RoseWind [281]

Answer:

x = 3/2 or 1.5

Step-by-step explanation:

6 - 2x = 3

(You have to subtract 6 on both sides so it can cancel out)

6 - 6 - 2x = 3 - 6

-2x = -3

(Now, you divide -2 on both sides to isolate the x)

-2/(-2)x = -3/(-2)

x = 3/2

5 0

3 years ago

Select all of the situations below that can be modeled by the expression 4 + 3x.

Hatshy [7]

Answer:

1 2 3

Step-by-step explanation:

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3 years ago

Which three lengths could be the lengths of the sides of a triangle?

Montano1993 [528]

C. 7 cm by 7 cm by 43 cm

5 0

3 years ago

Write an equation in slope-Intercept form for the line with slope 2/5 and y- ntercept - 3 .

Trava [24]

Answer:

y = $\frac{2}{5}$ x - 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = $\frac{2}{5}$ and c = - 3 , then

y = $\frac{2}{5}$ x - 3 ← equation of line

7 0

3 years ago

Read 2 more answers