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lbvjy [14]
3 years ago
5

Evaluate x(y-z) for x =3 y =9 and z =2

Mathematics
2 answers:
AnnZ [28]3 years ago
8 0

Answer:

21

Step-by-step explanation:

Substitute.

We are given x = 3, y = 9 and z = 2

3(9-2) = 3(7) = 21

lianna [129]3 years ago
7 0

Answer:

21

Step-by-step explanation:

Substitute the given values into the equation.

x(y-z)

x is equal to 3, y is equal to 9 and z is equal to 2. Substitute 3 in for x, 9 for y and 2 for z.

3(9-2)

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction

Subtract inside of the parentheses first.

3(7)

Multiply 3 and 7

21

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The lengths of the sides of a triangle are in the ratio of 6:6:5. The perimeter of the triangle
Oliga [24]

Hello!

Answer:

12 cm, 12 cm, 10 cm.

Step-by-step explanation:

Given:

Perimeter, or P = 34 cm

Ratio of sides = 6 : 6 : 5

To find the length of each side, we can use a variable in the ratio to find the perimeter:

34 = 6x + 6x + 5x

Combine like terms:

34 = 17x

Solve for x:

34/17 = 17x/17; x = 2

Plug in this value of "x" into each expression for the side-lengths:

6(2) = 12 cm

6(2) = 12 cm

5(2) = 10 cm

Therefore, the lengths of each side of the triangle are 12 cm, 12 cm, 10 cm.

Hope this helped you! :)

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3 years ago
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In a city, there are 16 swimming pools. On weekends, 6 of the pools are open.
Naddik [55]

Answer:George

Step-by-step explanation: George is correct because Emma said that the total number of pools in the city is 11 even though it says there are 16 pools in the city, but she got the number of how many are open, George is right because it says what is the ratio of pools open on the weekends to the total amount of pools, and it says there are 6 pools open on the weekend and there are 16 pools in the city in total so he would do 6:16.

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Answer:

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Step-by-step explanation:

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