the age of biken is two times more than that of mousam. if the sum of their age is 30 years than find their difference age with

solution

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

7 0

$b = 2m \\ b + m = 30 \\ m = 10 \\ b = 20$

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I need help plz

shusha [124]

The solution for given linear equation systems is (3,-4).

Option: C

Step-by-step explanation:

The given equations are 5x+3y=3 and x+y= -1.

Let us isolate x value from equation 5x+3y=3.

5x = 3-3y.

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

Substitute this x value in equation x+y= -1.

$\frac{3-3y}{5}+y=-1$ .

After taking LCM for the denominator,

$\frac{3-3y+5y}{5}= -1$ .

3-3y+5y=-5.

2y=-8.

y=-4.

For $x=\frac{3-3y}{5}$ substitute the y value.

$x=\frac{3-3(-4)}{5}$ .

$x=\frac{3+12}{5}$ .

$x=\frac{15}{5}$ .

x=3.

∴ The solution is (3,-4).

8 0

3 years ago

Esteban has a big jar of change in his room. He has 600 coins total, and 240 of them are pennies. What percentage of the coins a

Thepotemich [5.8K]

<h2>40 % of coins are pennies.</h2>

Step-by-step explanation:

Total number of coins = 600

Total number of pennies = 240

$\texttt{Percentage of the coins are pennies=}\frac{\texttt{Total number of pennies}}{\texttt{Total number of coins}}\times 100\\\\\texttt{Percentage of the coins are pennies=}\frac{240}{600}\times 100\\\\\texttt{Percentage of the coins are pennies=}\frac{240}{6}\\\\\texttt{Percentage of the coins are pennies=}\frac{120}{3}\\\\\texttt{Percentage of the coins are pennies=}40\%$