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aleksandr82 [10.1K]
4 years ago
7

I need help please it is just one question and can you explain how u did it thx please look at the picture thx

Mathematics
1 answer:
valina [46]4 years ago
7 0

Answer:

112

Step-by-step explanation:

A supplementary angle is 1 or more angles that add up to 180 degrees. So, the 2 angles we have are 2x and 3x + 10, and those add up to 180.

In order to make an equation for this, we need to add 2x and 3x + 10 and equal it to 180.

5x + 10 = 180

Now that we have our equation, the goal is to isolate the variable. The most immediate step I see is to subtract 10 from both sides so 5x will be alone on one side of the equation.

5x = 170

Now, to ultimately isolate the variable, we must divide both sides by 5 so that x will be alone.

170 / 5 is 34

5x / 5 is x

x = 34

Now, we plug in our value of x into 3x + 10 to find out what the measurement is equal to.

3(34) + 10 = y

102 + 10 = y

112 = y

3x + 10 is equal to 112.

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Hello there! I can help you! The formula for compound interest is P(1 + r)^t, where P= principal (initial amount), r = interest rate (in decimal form), and t = time (in years). Let's do this step by step. First off, we add the rate into 1. 4% is the interest rate (0.04 in decimal form). 1 + 0.04 is 1.04. Now, what we will do is raise that number to the 2nd power, because the time that elapses is 2 years. 1.04² is 1.0816. That's that. Now, multiply 7,500 to find the total amount of money. 1.0816 * 7,500 is 8,112. There. Toby's savings account balance in 2 years is £8,112.

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