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3 years ago

Can someone help me? I dont really know how to do this?

Mathematics

2 answers:

Elena L [17]3 years ago

4 0

Answer:

Step-by-step explanation:

x+2x+2x=5x

90/5=18

18*3=54

Liula [17]3 years ago

4 0

Answer:

The answer is 54.

Step-by-step explanation:

Ok buddy

‣Remember that a right angle equals 90 degrees.

‣The numbers lie on a right angle.

‣So watchya gonna do is combine the like terms.

$x + 2x + 2x = 5x$

‣In an equation, that finna look like:

$5x = 90$

‣Solve that equation

$\frac{5x}{5} = \frac{90}{5} \\ \\ x = 18$

‣Therefore, the value of x is 18.

‣We trynna find 3x so plug it.

$3x \\ 3(18) \\ 54$

‣That fr is the answer, 54.

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Does anyone know how to do this? please help me

Elis [28]

On the x column, you would write 1, 2, 3, 4, and so on. Then, in the y box, you plug in that number into the equation. Write your answer in the y column.

For example, if x = 1, then 1^2 + 2 - 8 = - 5.
If x = 1, y= -5

8 0

3 years ago

Read 2 more answers

A student has 10 coins in her pocket that have a value of 0.85,The coins are either nickels of dimes. Which system of linear equ

oee [108]

Answer:

p+q = 10...... 1

0.05p+0.10q = 0.85 ..... 2

Step-by-step explanation:

The question is incomplete. Here is the complete question.

A student has 10 coins in her pocket that have a value of $0.85. The coins are either nickels or dimes. If each nickel costs $0.05 and each dime costs $0.10. Which system of linear equations represents this scenario?

Let the number of nickel in the pocket of the student be p

Let the number of dime in the pocket of the student be q

If there are 10 coins in her pocket, then the total coins in her pocket will be represented by the equation;

p+q = 10...... 1

If each nickel costs $0.05, p nickels will cost $0.05×p = $0.05p

If each dime costs $0.10, q nickel will costs $0.10×q = $0.10q

Total amount will be $0.05p+$0.10q

Now if the total coins in her pocket has a value of $0.85, then the we will equate $0.05p+$0.10q to $0.85 to give our second linear equation as:

$0.05p+$0.10q = $0.85 ....... 2

Therefore, the system of linear equations represents this scenario are:

p+q = 10...... 1

0.05p+0.10q = 0.85 ..... 2