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3 years ago

What is the area of the real backyard?

Mathematics

1 answer:

prohojiy [21]3 years ago

7 0

50 meters, because if 4cm is 5 m, then it would be 5( 4cm, which equals 5m) multiplied by 10( 8cm÷4cm= 2. 2×5m= 10). So 5m × 10m = 50m. Hope this helps!

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Plz help me I can't figure it out

lys-0071 [83]

Answer:

$\sqrt{500}$

Step-by-step explanation:

when a value is outside of the root, then you can square it and put it back in. After you put it back in, you need to multiply it by the number that is remaining

In this case, you would square 10 which equals 100, and put it back into the root and multiply 100 by 5.

100x5=500

Therefore, the answer is A, root 500

7 0

3 years ago

Suppose that on the average, 7 students enrolled in a small liberal arts college have their automobiles stolen during the semest

Galina-37 [17]

Answer:

$P(x>1)=0.9927$

Step-by-step explanation:

From the question we are told that:

Mean $\=x =7$

Generally the Poisson equation for \=x is mathematically given by

$P(x>1)=1-P(x \leq 1)$

Therefor

$P(x>1)=1-(\frac{e^{-7}*7^0}{0!}+{\frac{e^{-7}*7^1}{1!})$

$P(x>1)=1-(9.1*10^{-4}+6.3*10^{-3})$

$P(x>1)=1-(7.3*10^{-3}$

$P(x>1)=0.9927$

3 0

3 years ago

From the sum of 3a^2−ab−2b^2 and 2a^2+5ab−3b^2 subtract a^2−3ab−4b^2

Lubov Fominskaja [6]

$(3a^2-ab-2b^2) + (2a^2+5ab-3b^2) - (a^2-3ab-4b^2)$

First we distribute the negative throughout the last polynomial:

$(3a^2-ab-2b^2) + (2a^2+5ab-3b^2) + (-a^2+3ab+4b^2)$

Combine like terms:

$4a^2 + 7ab - b^2$

3 0

3 years ago

What is number 3 and 4

Morgarella [4.7K]

NUMBER 3 :

150 feet / 15 = 10 units
120 feet / 15 = 8 units

So it will be 10 units by 8 units

NUMBER 4:

A) 525/4.2 = 120

The scale used was 120

B) 0.6 inches = 0.0152

525 / 0.0152 = 35 sheets tall

5 0

3 years ago

1.Mr. Bowen’s test is normally distributed with a mean of 75 and a standard deviation of 3 points.

lianna [129]

Answer:

2.28%

Step-by-step explanation:

Mr. bowens test is normally distributed with a mean (μ) of 75 and a standard deviation (σ) of 3 points.

The z score is used in probability to show how many standard deviation is a raw score below or above the mean. The formula for the z score (z) is given by:

$z=\frac{x-\mu}{\sigma}$

For a raw score (x) of 81 points, the z score can be calculated by:

$z=\frac{x-\mu}{\sigma}=\frac{81-75}{3}=2$

Therefore from the normal probability distribution table, the probability that a randomly selected score is greater than 81 can be given as:

P(x > 81) = P(z > 2) = 1 - P(z < 2) = 1 - 0.9772 = 0.0228 = 2.28%

7 0

4 years ago