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3 years ago

Can you help me please!

Mathematics

1 answer:

Lostsunrise [7]3 years ago

8 0

9514 1404 393

Answer:

Lanza is correct.

Step-by-step explanation:

The two missing dimensions on the left are 4.5 m on the vertical line, and 5 m on the horizontal line.

These dimensions let us partition the garden a number of ways. One way is ...

a rectangle 9 m by 4.5 m
a rectangle 4 m by 3.5 m

The total of the areas of these is ...

(9)(4.5) +4(3.5) = 40.5 +14 = 54.5 . . . . square meters

At £16 per square meter, Lanza's charge will be ...

£16 × 54.5 = £872

Lanza is correct that she will have to charge more than £800.

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X squared plus x y - 12 y squared

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3 years ago

A: x/4 +1 = -3 B: x+4 = -12 1) How can we get Equation B from Equation A?

Sveta_85 [38]

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4 years ago

Solve the equation, and check the solutions (√x+3)+6=3.

larisa86 [58]

Answer:

The equation has no solution.

Step-by-step explanation:

Hi there!

First, let´s write the equation:

(√x + 3) + 6 = 3

To solve the equation, let´s subtract 6 to both sides of the equation:

√x + 3 = -3

subtract 3 to both sides of the equation:

√x = -6 (the square root of any number can´t be negative, but let´s solve it anyway and then check the solution).

Square both sides of the equation:

x = 36

Now, let´s check the solution:

(√x + 3) + 6 = 3

x = 36

(√36 + 3) + 6 = 3

(6 + 3) + 6 = 3

9 + 6 = 3

15 ≠ 3

Then, the equation has no solution.

Have a nice day!

6 0

3 years ago

A test is used to assess readiness for college. In a recent year, the mean test score was 20.3 and the standard deviation was 4

Vlada [557]

Answer:

$\mu = 20.3$

$\sigma = 4.9$

And we can find the limits in order to consider values as significantly low and high like this:

$Low\leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5$

$High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

For this case we can consider a value to be significantly low if we have that the z score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is higher tor equal to 2.

For this case we have the mean and the deviation given:

$\mu = 20.3$

$\sigma = 4.9$

And we can find the limits in order to consider values as significantly low and high like this:

$Low \leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5$

$High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1$

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3 years ago

The polygons are similar. find the missing length. i will give brainliest to first correct answer! HELP

yanalaym [24]

Answer:

The answer is 48, I hope this helps!

Step-by-step explanation:

would you like me to explain?

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3 years ago