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m_a_m_a [10]
3 years ago
8

Dylan is evaluating the expression 13+19+7+10. At one step in his work, Dylan rewrites the equation as 13+7+19+10. Which propert

y of addition must Dylan have used when he evaluated the expression?
Mathematics
2 answers:
stich3 [128]3 years ago
5 0

Answer:

commutative property of addition

Step-by-step explanation:

Dylan is evaluating the expression 13+19+7+10. At one step in his work, Dylan rewrites the equation as 13+7+19+10

13+19+7+10 = 13+7+19+10

commutative property of addition statest that

a + b = b+a

When the order of terms are changed in addition , it will change the value.

the value remains the same.

Dylan rewrites the expression by changing the order of terms

So its commutative property of addition

SOVA2 [1]3 years ago
4 0
He used the commutative property of addition.<span />
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Step-by-step explanation:

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6 0
3 years ago
What is y=\dfrac{2}{3}x+4y=
lara [203]

Answer:

12y+x-12=0

Step-by-step explanation:

If I'm not mistaken by the question, we have

x+4y=\dfrac{2}{3}x+4

Multiply through by the LCM of all the denominators to clear the fractions. Since we have only one fraction, we multiply through by its LCM (3)

3\timesx+3\times4y=3\times\dfrac{2}{3}x+3\times4

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Putting all terms on the LHS (left hand side) and evaluating,

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5 0
3 years ago
Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅?
Tom [10]

Answer: Option C is correct


Step-by-step explanation:

We know tha tCos(A-B) = cosA cosB + sinAsinB

Plugging A = 180 and B = Ф

cos(180-Ф)= cos180cosФ+sin180sinФ

                  = (-1) cosФ+ (0) sinФ   [ since cos180=-1 and sin180 =0]

                 = -cosФ + 0

                 = -cosФ

Therefore option C is the correct answer.        

6 0
3 years ago
Read 2 more answers
How can i get the output?
diamong [38]
In a function, you need to substitute your input value for x in order to get your output. For example, if you have the function f(x)=3x, and your input value is 3, you have to substitute in 3 for x. In this case, 3 x 3 is equal to 9, therefore, your output for 3 in this function is 9. Keep in mind that the output always changes between equations.
8 0
4 years ago
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