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Liono4ka [1.6K]
3 years ago
7

Maggie is x years old. Her brother Demarco is 4 years older than her. Anna is 3 times as old as Demarco. Write and simplify an e

xpression that represents Anna's age. Explain
Mathematics
1 answer:
ExtremeBDS [4]3 years ago
7 0
Maggie = x years old
Demarco = x + 4
Anna = 3*Demarco

Anna = 3*(x + 4)
Anna = 3x + 12

Hope this helps!


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Write a standard form of a quadratic equation that has roots - 5/2 and 3.
lora16 [44]

Answer:

2x^2 - x - 15 = 0.

Step-by-step explanation:

In factor form this is

(x + 5/2)(x - 3) = 0

x^2 + 5/2x - 3x  - 15/2 = 0

x^2 - 1/2x - 15/2 = 0

Multiply through by 2:

2x^2 - x - 15 = 0.

6 0
3 years ago
Math is not my strong point..
Leya [2.2K]
Answer: 16 in

Explanation:

PQ/QR = PT/TS

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PQ x 3 = 48
PQ = 48/3
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6 0
3 years ago
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You need to solve a system of equations. You decide to use the elimination method. Which of these is not allowed? 2x - 3y = 12
suter [353]

Answer:

A.

Step-by-step explanation:

The Elimination Method is the method for solving a pair of linear equations which reduces one equation to one that has only a single variable.

If the coefficients of one variable are opposites, you add the equations to eliminate a variable, and then solve.

If the coefficients are not opposites, then we multiply one or both equations by a number to create opposite coefficients, and then add the equations to eliminate a variable and solve.

When multiplying the equation by a coefficient, we multiply both sides of the equation (multiplying both sides of the equation by some nonzero number does not change the solution).

So, option B is not allowed (it is not allowed to multiply only one part of the equation)

6 0
3 years ago
PLZZZZZ HELP ME! :) XDDD
Taya2010 [7]
 In order to figure out what the answer is you would have to divide the number of feet it fell by the time. If you do 35.75 divided by 3.25 it would be 11. 
So the answer most likely would be 11
Please correct me if I am wrong
Have a great day!
4 0
3 years ago
Did I get this right? If I did t could someone explain it to me
Kisachek [45]

Answer:

Yes, you are correct.

Step-by-step explanation:

3 0
3 years ago
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