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3 years ago

The coefficient of xy in the product of (4x2 + 2y) and (3x + y2) is

Mathematics

2 answers:

nadya68 [22]3 years ago

4 0

(4x² + 2y)(3x + y²) =

12x³ + 4x²y² + 6xy + 2y³

The coefficient of xy is 6

icang [17]3 years ago

3 0

In polynomials, when a term contains both a number and a variable part, the number is called the co-efficient.
In this problem the co-efficient of x =
(8+y)+(3x+y2)
3y+3x+8
Therefore the co efficient of x and y is 3

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Solve for y: 15 = y – 7

mixer [17]

Some number y has 7 subtracted off to get 15. We have y-7 = 15. To isolate y, we have to undo the "subtract 7" operation that happens to y. We have to add 7 to both sides.

y-7 = 15

y-7+7 = 15+7

y = 22 is the answer

8 0

3 years ago

Read 2 more answers

ms ari buys and sells dimonds she has a dimond that weighs 1.825 carats what is the weight of ms aris dimond rounded to the near

Aneli [31]

1.825 rounded to the nearest hundredth is 1.83 because the number after 2 is 5

5 0

3 years ago

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Researchers have discovered a new genetic marker for a form of cancer. Twelve percent of the overall population carry this marke

In-s [12.5K]

Answer:

The probability that a person with the marker develops cancer is 0.0725.

Step-by-step explanation:

Let's denote the events as follows:

A = a person has cancer

B = a person carries the marker.

Given:

P (A) = 0.03

P (B) = 0.12

P (B|A) = 0.29

The conditional probability of an event X provided that another event Y has already occurred is:

$P(X|Y)=\frac{P(Y|X)P(X)}{P(Y)}$

Use the conditional probability formula to compute the probability that a person with the marker develops cancer.

$P(A|B)=\frac{P(B|A)P(A)}{P(B)} =\frac{0.29\times0.03}{0.12}=0.0725$

Thus, the probability that a person with the marker develops cancer is 0.0725.

3 0

3 years ago

Solve for x: - 2x – 4 < 10

Charra [1.4K]

Answer:

The correct answer would be the second one: x > - 7

Step-by-step explanation:

Hope this helps!

8 0

3 years ago

A gym charges a one-time registration fee as well as a monthly fee. The cost of joining the gym for 4 months is $370, and the co

Anna007 [38]

$x-\ registration\ fee\\
y-\ monthly\ fee\\\\
 \left \{ {{x+4y=370} \atop {x+6y=530\ \ |*(-1)}} \right. \\\\
 \left \{ {{x+4y=370} \atop {-x-6y=-530}} \right. \\+-----\\Addition\\\\
-2y=-160\ \ | divide\ by\ -2\\
y=80\\\\
x=370-4y=370-4*80=370-320=50\\\\
Registration\ fee\ is\ equal\ to\ 50\$\ and\ monthly\ fee\ is\ equal\ to\ 80\$.
$

8 0

3 years ago