Give one example of when you would use the friendly numbers strategy to substract

Mathematics

1 answer:

harina [27]3 years ago

8 0

Like when you have 3-3 would be 0

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Prove: The sum of two multiples of 3 is a multiple of 3

andrey2020 [161]

Answer:

3 . . . goes in both boxes

Step-by-step explanation:

Use the distributive property. Remove the common factor to outside parentheses:

3(m +n) = a multiple of 3

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3 years ago

F(x)=4x+1<br> g(x)=−4x−1<br> Write g in terms of f

Assoli18 [71]

Answer:

i think that the answers is -16x + 5

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3 years ago

Do the ratios 10/8 and 16/20 form a proportion<br><br> Yes or no?

ziro4ka [17]

Answer:

No. Reduce 10/8 by dividing by 2. 10/8= 5, 8/2= 4. 10/8= 5/4. Reduce 16/20 by dividing by 4. 16/4= 4 , 20/4= 5. 16/20= 4/5.

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3 years ago

The price of an item is $35 but you have to pay $38.22 what is the sale tax rate?

Vilka [71]

3.22$ because your originally spending 35$ so the added 3.22$ makes up 38.22$

6 0

3 years ago

Which of the following are solutions to the equation below?

Natasha2012 [34]

Both A and C would be solutions to the equation.

In order to solve for this you must first get the equation equal to 0.

2x^2+5x+8=6 ----> subtract 6 from both sides
2x^2 + 5x + 2 = 0

Now knowing this we can use the coefficients of each one in descending order of power as a, b and c.

a = 2 (because it is the coefficient to x^2)
b = 5 (because it is the coefficient to x)
c = 2 (because it is the end number)

Now we can plug these values into the quadratic equation.

$\frac{-b +/- \sqrt{b^{2} - 4ac } }{2a}$

$\frac{-5 +/- \sqrt{5^{2} - 4(2)(2) } }{2(2)}$

$\frac{-5 +/- \sqrt{9} }{4}$

$\frac{-5 +/- 3 }{4}$

$\frac{-5 + 3 }{4}$ or -1/2 for the first answer

$\frac{-5 - 3 }{4}$ or -2 for the second answer

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3 years ago