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3 years ago

Rachel gave 1/4 of a pie to each of her 5 friends. How much pie did she give away in all?

Mathematics

1 answer:

Bingel [31]3 years ago

6 0

1 and 1/4 pies

5/4 = 1 and 1/4

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7x-2y=16 11x+6y=32.3<br>how to solve this math problem

Aneli [31]

Answer:

Step-by-step explanation:

These types of equations are called simultaneous equations and the method we can use to solve these type of equations is either Substitution, Elimination and Graphing.

We use substitution here because it is easier.

Equation 1

$7x-2y=16$

Equation 2

$11x+6y=32.3$

Lets take equation 1

$7x-2y=16\\7x=16+2y\\x=\frac{16+2y}{7}$

This is our equation 3 , now put it inside equation 2.

$11x+6y=32.3\\11(\frac{16+2y}{7} )+6y=32.3\\\frac{176+22y}{7} +6y=32.3\\\frac{176+22y+42y}{7}=32.3\\176+22y+42y=226.1 \\\\42y+22y=226.1-176\\64y=50.1\\y=\frac{50.1}{64} \\y=0.783\\$

We found the value of y , now to find the value of x insert the value of y in equation 3

$x=\frac{16+2y}{7}\\x=\frac{16+2(0.783)}{7} \\x=\frac{16+1.566}{7}\\x=\frac{17.566}{7}\\x=2.509$

Solved ! See the attached image on both the straight line graphs i have attached for better understanding. Where both the lines intersect each other is our value of (x , y) respectively.

6 0

3 years ago

How does Elian's drawing show that the number 10 is a composite number?

kumpel [21]

It shows that there is only one way to get to 10 which is by multiplying it by 1

6 0

3 years ago

Which ordered pair is a solution to this equation?

hjlf

The answer to this is (11, 1).

4 0

3 years ago

12(43)

IrinaVladis [17]

I’m not entirely sure how to answer this without a word problem, but from what I see, all you have to do is multiply the two numbers.
12 x 43= 516
5 x 88 = 440
8x 63= 504
7 x 28= 196
Usually, when you see a number followed by another number in parentheses, like here, that means to multiply.

3 0

3 years ago

Read 2 more answers

Round the following times to 1 decimal place 8.16

Mekhanik [1.2K]

The answer is 8.2 bc anything above a 5 goes up.
8.16 <<< a 6 is greater than 5. So the 1 goes up to a 2.

4 0

3 years ago