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3 years ago

Explain how usingbasic facts can help you find 10 x 20 x 30 x 40 mentally.

Mathematics

2 answers:

Leokris [45]3 years ago

5 0

Answer:

Step-by-step explanation:

We know that 1x 2 is 2 (add the 2 zeros to make it 200)

And 3x4 is 12 (add 2 zeros and make it 1200) Then Add

Natasha_Volkova [10]3 years ago

3 0

Answer: 240000

Step-by-step explanation: 10 · 10 · 10 · 10 = 10000

1 · 2 · 3 · 4 = 24

10 · 20 · 30 · 40 = 240000

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A candy company claims that 20% of the candies in its bags are colored green. Steve buys 30 bags of 30 candies, randomly selects

Allisa [31]

Answer:

The probability of Steve agreeing with the company’s claim is 0.50502.

Step-by-step explanation:

Let X denote the number of green candies.

The probability of green candies is, p = 0.20.

Steve buys 30 bags of 30 candies, randomly selects one candy from each, and counts the number of green candies.

So, n = 30 candies are randomly selected.

All the candies are independent of each other.

The random variable X follows a binomial distribution with parameter n = 30 and p = 0.20.

It is provided that if there are 5, 6, or 7 green candies, Steve will conclude that the company’s claim is correct.

Compute the probability of 5, 6 and 7 green candies as follows:

$P(X=5)={30\choose 5}(0.20)^{5}(1-0.20)^{30-5}=0.17228\\\\P(X=6)={30\choose 6}(0.20)^{6}(1-0.20)^{30-6}=0.17946\\\\P(X=7)={30\choose 7}(0.20)^{7}(1-0.20)^{30-7}=0.15328$

Then the probability of Steve agreeing with the company’s claim is:

P (Accepting the claim) = P (X = 5) + P (X = 6) + P (X = 7)

= 0.17228 + 0.17946 + 0.15328

= 0.50502

Thus, the probability of Steve agreeing with the company’s claim is 0.50502.

7 0

3 years ago

What is the equation of the line that passes through the points (-1, 3) and (1, 11)

lina2011 [118]

Answer: To find the slope of this line, you would use the fomula

y2 - y1/ x2 - x1

11 - 3 / 1 - (-1)=

8/2

The slope of your line would be 4

3 0

3 years ago

If jenny has 1,490÷6 how will you solve it.

puteri [66]

It's 248.3333 (but with the 3s repeating)

5 0

3 years ago

AABC - ADEF Find the value of x

kobusy [5.1K]

Answer:

$\boxed{x = 4}$

Step-by-step explanation:

If ΔABC ~ ΔDEF

Then their sides must be proportional such that:

=> $\frac{x}{3} = \frac{8}{6}$

Cross Multiplying

=> x * 6 = 8*3

=> 6x = 24

Dividing both sides by 6

=> x = 4

4 0

4 years ago

Read 2 more answers

Help Please! Solve for d. 5+d>5−d Solve for p. 2p+3>2(p−3)

Keith_Richards [23]

Solve for d.
5+d>5−d Subtract 5 from both sides of this inequality:

d>d There is no value for d that satisfies this inequality.
No value can be greater than itself.

Solve for p.
2p+3>2(p−3) Multiply this out: 2p+3>2p-6
 Subtr 3 from both sides: 2p> 2p-9

This is equivalent to 2p+9>2p.
We could subtr. 2p from both sides: 0>-9.

0> -9 is always true. Thus, the given inequality has infinitely many solutions.

3 0

3 years ago

Explain how usingbasic facts can help you find 10 x 20 x 30 x 40 mentally.​

Explain how usingbasic facts can help you find 10 x 20 x 30 x 40 mentally.