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3 years ago

HELP PLSS!1!1!

Mathematics

2 answers:

gogolik [260]3 years ago

6 0

You can simply enter the two equations into Desmos in the future unless showing your work is required
Solution is (2,3)

aivan3 [116]3 years ago

3 0

The answer is A.(2,3)

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Which expression is equivalent to StartRoot negative 80 EndRoot? Negative 4 StartRoot 5 EndRoot Negative 4 StartRoot 5 EndRoot i

sdas [7]

Answer:

(4√5)i

Step-by-step explanation:

Complex number is a number in the form a + bi, where both a and b are real numbers. A complex number has two parts, the first part a is the real part of the complex number and the second part b is the imaginary part of the complex number. Also, i = √(-1), hence i² = -1.

Complex numbers can also be graphed on the complex plane.

√(-80) = √(-1) × √(80)

But since √(-1) = i

√(-80) = i × √80 = i × √16 × √5 = i × 4 × √5 = (4√5)i

√(-80) = (4√5)i

6 0

3 years ago

Mr Floyd is laying grass squares in his backyard. He will cover the entire yard except for the vegetable garden. How many square

Alenkasestr [34]

Here we can first find the area of yard and then subtract the area of vegetable garden to get the required area.

The formula to find area is given by:

$A = l* w$

Now we find area of yard:

length is 25 ft and width is 15 ft.

$A = 25 * 15$

Area of yard = 375 ft²

Area of vegetable garden:

length = 8ft and width =8ft

So the vegetable garden is a square.

Area = 8*8

Area of vegetable garden =64 ft²

Area of backyard to be laid with grass = Area of yard-Area of vegetable garden

Area required = 375 -64 = 311 ft²

Answer : The area of backyard in which grass is to be laid is 311 square feet.

3 0

3 years ago

Read 2 more answers

You deposit $300 in a savings account. The account earns 10% simple interest per year.

Phantasy [73]

Answer:

Step-by-step explanation:

The interest after 8 years is $240

The balance after 8 years is $540

Hope this helps!

Plz, Mark Brainliest!

3 0

3 years ago

F(x) = (x − 6)2 − 31

eimsori [14]

Answer:

2x -43

Step-by-step explanation:

Distribute 2 to into the parenthesis: 2 * x and 2 * -6

2x + -12 - 31

Combine like-terms: -12 + - 31 = -43

2x -43

IF you need the equation completely simplified, I bEliVe you would be able to divide by 2 to get it: x - 21.5

5 0

3 years ago

Select all of the true statements about the standard deviation of a quantitative variable. The standard deviation of a set of va

Pepsi [2]

Answer:

The standard deviation of a set of values is equal to 0 if and only if all of the values are the same; The standard deviation of a group of values is a measure of how far the values are from the mean; Standard deviation is never negative.

Step-by-step explanation:

Standard deviation is the distance, on average, that each point is from the mean. The only way this value can be zero is if every value is the same as the mean, making all of the data values the same.

Since standard deviation is the square root of the variance, standard deviation is never negative.

Since the standard deviation is a measure of spread from the mean, which is not resistant to outliers, the standard deviation itself is not resistant to outliers.

Changing the units of a set of values involves multiplying by a constant. For example, changing from feet to inches involves multiplying each data value by 12. When we do this, the standard deviation will also be multiplied by the same constant.

For a set of values with mean of 0 and a standard deviation that is not 0, removing a data point with a value of 0 will have an effect on the standard deviation. For example, the data set 3, 2, 1, 0, -1, -2 -3 has a mean of 0. The standard deviation of the set is 2. Removing the data point 0 increases the standard deviation to about 2.2.

7 0

3 years ago