3 years ago

Which expression is equivalent to 4(3n -5)?

Mathematics

2 answers:

ra1l [238]3 years ago

8 0

Answer:

12n - 20

Step-by-step explanation:

1. 4(3n-5)

2. 4(3n-5) = 12n - 20 multiply every number in ( ) by 4 (include variables)

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aksik [14]3 years ago

4 0

Answer:

12n-20

Step-by-step explanation:

Use distribution

4×3n= 12n

4×(-5)= -20

12n-20

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A cookie recipe that yields 24 cookies requires 1 3/4 cups of butter. When the ingredients in this recipe are increased proporti

erik [133]

Answer:

5 1/4

Step-by-step explanation:

* is multiplication

1 3/4 is 1.75

24/1.75 = 72/×

1.75 * 72 = 24 * x

126 = 24x

24x = 126

x = 5.25 or 5 1/4

8 0

3 years ago

The sum of two polynomials is –yz2 – 3z2 – 4y + 4. If one of the polynomials is y – 4yz2 – 3, what is the other polynomial? –2yz

marishachu [46]

The first polynomial is $y -4yz^2-3$ and let the second polynomial be P(y,z).

If the sum of two polynomials is $-yz^2-3z^2-4y+4$ , then $y-4yz^2-3+P(y,z)=-yz^2-3z^2-4y+4$ .

Take the first polynomial from the left side to the right side:

$P(y,z)=-yz^2-3z^2-4y+4 -(y-4yz^2-3),\\ P(y,z)=-yz^2-3z^2-4y+4 -y+4yz^2+3,\\ P(y,z)=3yz^2-3z^2-5y+7$ .

Answer: the second polynomial is $3yz^2-3z^2-5y+7$ .