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3 years ago

A card is selected at random from a deck of cards. What is the probability of randomly selecting a diamond or a 7?

Mathematics

1 answer:

Dominik [7]3 years ago

7 0

Answer:

your answer is 4/13ths. #markasbrainliest

You might be interested in

Which quadratic equation has roots –2 and 1/5?

AysviL [449]

Answer:

The equation $5x^2\:+\:9x\:-\:2\:=\:0$ has roots –2 and 1/5.

Hence, the option 'a' is the correct answer.

Step-by-step explanation:

Checking the equation

$5x^2\:+\:9x\:-\:2\:=\:0$

putting x = -2 in the equation

$5\left(-2\right)^2\:+\:9\left(-2\right)-\:2\:=\:0\:$

$2^2\cdot \:\:5-9\cdot \:\:2-2=0$

$2^2\cdot \:5-18-2=0$

$20-20=0$

$0=0$

L.H.S=R.H.S

putting x = 1/5 in the equation

$5\left(\frac{1}{5}\right)^2\:+\:9\left(\frac{1}{5}\right)-\:2\:=\:0\:$

$5\left(\frac{1}{5}\right)^2+9\cdot \:\frac{1}{5}-2=0$

$\frac{1}{5}+\frac{9}{5}-2=0$

$2-2=0$

$0=0$

L.H.S=R.H.S

As putting x = -2 and x = 1/5 satisfy the equation.

Therefore, the equation $5x^2\:+\:9x\:-\:2\:=\:0$ has roots –2 and 1/5.

Hence, the option 'a' is the correct answer.

4 0

3 years ago

I dont know the answer

Anettt [7]

Answer:

Step-by-step explanation:

1/4 × 4 = 1

4 and 4 will get cancelled and only 1 will be left.

Hope this helps

plz mark as brainliest!!!!!

3 0

3 years ago

I need an answer to this, I dont get it, wouldnt it be impossible due to like terms? g3b=5x+2

Serjik [45]

Answer:

Step-by-step explanation:

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$x^{2} x^{2} \geq x^{2} \neq \geq \geq$

4 0

3 years ago

What is b + 3 (b - 2) = 2

Lunna [17]

Answer:

b=2

Step-by-step explanation:

b+3b - 6 =2

4b=8

b=2

Have a good day

4 0

3 years ago

Read 2 more answers

I NEEDDD HEELPPPP

seraphim [82]

hm its just that i dont know so maybe try do smth else

8 0

3 years ago