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2 years ago

Factor completely 3x2 + y.

Mathematics

2 answers:

tatiyna2 years ago

6 0

Answer: The factorised form would be (3x²+y) itself.

Step-by-step explanation:

Since we have given that

$3x^2+y$

We need to find the factorisation of the above expression:

There are two terms:

1) 3x²

2) y

Factors of 3x² = 1,3,x,x

Factors of y = 1,y

As we can see that there is no common factor between them.

So, it can't be factorised any more .

So, the factorised form would be (3x²+y) itself.

Margarita [4]2 years ago

4 0

3x^2+y (there is no common factor to further simplify this)

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the variables x and y vary inversely with a constant variation of 7. Use the variation formula, k=xy, to find why when x=9

dolphi86 [110]

1.Make y the subject

k = xy

k/x = xy/x

y = k/x

2.Substitute

y = k/x

y = 7/9

y = 0.777......

y = 0.8 (Answer)

To confirm

k = xy

k = 9 × 0.8

k = 7.2

k = 7 (constant)

Hope it helps☺

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2 years ago

Applying the Procedure

Verizon [17]

Answer:

15 Square Inches

Step-by-step explanation:

Volume of the cone=40 cubic inches

Height of the cone=8 Inches

Step 1: Applying the formula for the volume of a cone

Volume of a Cone $=\frac{1}{3}\pi r^2 h=\frac{1}{3} X $Base Area X Height$

Step 2: Substituting values for the variables

$40=\frac{1}{3} X $Base Area X 8$

Step 3: Simplifying the right side

$40=\frac{8}{3} X $Base Area$

Step 4: Multiplying by the reciprocal

$40X\frac{3}{8}=\frac{8}{3} X\frac{3}{8} X $Base Area\\$

Therefore, Base Area of the Cone=15 Square Inches

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3 years ago

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