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3 years ago

• Which operations are used in the expression 2x – 4? Choose ALL that apply.

Mathematics

2 answers:

solong [7]3 years ago

8 0

Answer:

The expression uses multiplication and subtraction.

worty [1.4K]3 years ago

3 0

Multiplication and Addition

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Ans this question any one

Alenkasestr [34]

Answer:

None of them

Step-by-step explanation:

A polynomial must have a pronumeral that is to the power of an integer, and you can't divide by a variable such as 2/x so for

a) there is a $\sqrt{x}$ which means it's not a polynomial as $\sqrt{x}$ is the same as $x^{1/2}$

b) The second term is being divided with a variable so that can't be a polynomial

c) There is a $\sqrt{3x}$ so it can't be a polynomial

d) There is a $\sqrt{y}$ so it can't be a polynomial

7 0

4 years ago

Find the value of x and the value of y.

Eddi Din [679]

Answer:

Option A

Step-by-step explanation:

To find all missing sides of a right triangle we use the sine, cosine or tangent ratio as below,

sinθ = $\frac{\text{Opposite side}}{\text{Hypotenuse}}$

cosθ = $\frac{\text{Adjacent side}}{\text{Hypotenuse}}$

tanθ = $\frac{\text{Opposite side}}{\text{Adjacent side}}$

Now we take an angle measuring 60°

sin(60°) = $\frac{6}{y}$

$\frac{\sqrt{3} }{2}=\frac{6}{y}$

y = 4√3

tan(60°) = $\frac{6}{x}$

√3 = $\frac{6}{x}$

x = 2√3

Therefore, Option A will be the correct option.

7 0

3 years ago

Consider two events such that P(A)=3/4, P(B)=2/5 and P(AnB)=1/3. Are the events A and B independent?

posledela

If P(A) times P(B) is equal to P(A n B), then that shows the events are independent. Otherwise, they are dependent. When I write "A n B", I mean "A intersect B". The intersect symbol looks similar to the lowercase letter n.

P(A)*P(B) = (3/4)*(2/5) = (3*2)/(4*5) = 6/20 = 3/10

Since that result is not the same as P(A n B) = 1/3, this means that the events are not independent. They are dependent events. The answer is choice D

6 0

3 years ago

Initially 100 milligrams of a radioactive substance was present. After 5 hours the mass had decreased by 2%. If the rate of deca

guapka [62]

Answer:

The half-life of the radioactive substance is 135.9 hours.

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7 0

3 years ago

Which list of ordered pairs represents solutions to x + y = 2? (-4, 6), (0, 2), (4, 2); (-4, -6), (0, 2), (4, 2); (-4, 6), (0, 2

baherus [9]

Answer:

(-4, 6), (0, 2), (4, -2)

Step-by-step explanation:

x + y = 2?

(-4, 6), -4+6 = 2 True this is a solution

(0, 2), 0+2 = 2 True this is a solution

(4, 2); 4+2 = 6 False this is not a solution

This is not a solution set since we have a pair that is not a solution

(-4, -6), -4+-6 = 10 False this is not a solution. We do not have to check the rest since this cannot be a solution set

(0, 2),

(4, 2);

This is not a solution set since we have a pair that is not a solution

(-4, 6), -4 + 6 = 2 True this is a solution

(0, 2), 0 + 2 =2 True this is a solution

(4, -2) 4-2 =2 True this is a solution

This is a solution set since all the points are a solution

4 0

4 years ago

Read 2 more answers