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3 years ago

What is the probability of not drawing a green marble? 75% 60% 2/3 4/5

Mathematics

1 answer:

chubhunter [2.5K]3 years ago

4 0

Answer:

75 %

15 ÷ 20 = 0.75

0.75 × 100 = 75%

hope it helps!

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Gordon types 2,146 words in 29 minutes. Find the unit rate.

4vir4ik [10]

Commenting to ask one more question myself sorry!!

4 0

3 years ago

A rectangular brick has a length of 5 centimeters, a width of 9 centimeters and a height of 20 centimeters.What is the surface a

a_sh-v [17]

ANSWER
The surface area of the brick is;

$650 \: {cm}^{2}$

EXPLANATION

The dimensions of the rectangular brick are

$l = 5cm$
$w = 9cm$
$h = 20cm$

The total surface area of a rectangular brick is given by,

$T.S.A = 2(lw + lh + hw)$

We substitute the values into the formula to obtain,

$T.S.A = 2(5 \times 9 + 5 \times 20 + 9 \times 20)$

$T.S.A = 2(45+ 100+ 180)$

$T.S.A = 2(325)$

$T.S.A =650 \: {cm}^{2}$

6 0

3 years ago

I need help, plz help meh, pplz

Leya [2.2K]

I will only answer 1, 4, and 5 for you.

#1.

2pm = 10 feet, 6pm = 2 feet

You would subtract so 6 - 2 = 4 hours

10 - 2 = 8 hours

The water went down 8 feet in 4 hours

Then you'd find how many feet it went down in an hour, which you'd divide

8/4 = 2 feet

The constant rate of the water would be 2 feet/hour

#4.

Jazz = 43 inches tall, 18 months later Jazz = 52 inches tall

Again, you'd subtract just like we did in #1.

52 - 43 = 9 inches

Then you'd divide 9 inches into the 18 months

9/18 = 0.5

So Jaz grew 0.5 inches.

For this question, all you have to do is look at the graph. You see those points? Look at the numbers on the side, you will see that they increase by 10 each time. So there's your answer! Toby biked 10 miles per week.

6 0

4 years ago

Prove 2√(x) + 1/√(x + 1) <= 2√(x+1) for all x in [0,inf)

EleoNora [17]

Start by multiplying each side of the inequality by $\sqrt{x + 1}$ and simplifying:

$2 \sqrt x + \frac{1}{\sqrt{x+1}} \leq 2 \sqrt{x + 1}$
$(2 \sqrt x + \frac{1}{\sqrt{x+1}})(\sqrt{x + 1}) \leq (2 \sqrt{x + 1})(\sqrt{x + 1})$
$2 \sqrt{x(x + 1)} + 1 \leq 2(x + 1)$
$2 \sqrt{x^2 + x} + 1 \leq 2x + 2$
$2 \sqrt{x^2 + x} \leq 2x + 1$
$\sqrt{x^2 + x} \leq x + \frac{1}{2}$

From here, we can square both sides to get

$x^2 + x \leq (x + \frac{1}{2})^2$
$x^2 + x \leq x^2 + x + \frac{1}{4}$
$0 \leq \frac{1}{4}$ , which is always true.

3 0

3 years ago

What’s the equation for<br><br> 3/9 + 2/3

Katyanochek1 [597]

Answer:

Step-by-step explanation:

3/9 + 2/3

Simplify the first fraction by dividing the top and bottom by 3

1/3 + 2/3

Since the denominators are the same, add the numerators

3/3

4 0

4 years ago