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3 years ago

Which of these is the best approximation of

Mathematics

1 answer:

user100 [1]3 years ago

7 0

Answer:

oc)0.83

Step-by-step explanation:

have a good day!!!

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Find the value of x. Round your answer to the nearest tenth.

BlackZzzverrR [31]

Answer:

10.39 or 10.4

Step-by-step explanation:

Since this is a right triangle, you have the formula a squared +b squared = c squared where a and b are the legs and c is the hypotenuse. You plug in the values and you should get sqrt of 108 for x.

8 0

3 years ago

Expand the polynomial and simplify: (4xy− 1 8 y^2)^2

Vinvika [58]

Answer: $4y^{2}(2x-9y)^{2}$

Step-by-step explanation:

We have the following polynomial:

$(4xy-18y^{2})^{2}$

This is a polynomial of the form $(a-b)^{2}=a^{2}-2ab+b^{2}$ . Following this rule to expand it, we have:

$(4xy)^{2}-2(4xy)(18y^{2})+(18y^{2})^{2}$

$16x^{2}y^{2}-144xy^{3}+324y^{4}$

Applying common factor $4y^{2}$ :

$4y^{2}(4x^{2}-36xy+81y^{2})$

Note the polynomial inside the parenthesis is a perfect square trinomial, which can be factored to $(2x-9y)^{2}$ . Hence, the final simplification is:

$4y^{2}(2x-9y)^{2}$

3 0

3 years ago

Consider the following: A medical researcher wants to determine the effects of pH (a measure of alkalinity or acidity, with pure

natita [175]

Answer:

See below

Step-by-step explanation:

<h3>Continuation of the question</h3>

Data in the table:

PH 4 5 6 7 8 9 10 11

Bacteria 116 120 131 136 141 151 148 163

Create a scatter plot to represent the data: Based on the data and your scatter plot, what do you think a good linear function would be to represent the data?

<h3>Solution</h3>

See attached for scatter plot

We can see the chart is close to linear function. Let's build one based on data in the table

The line will be in the form of:

y = mx + b

If we use two points and get the equation

(4, 116) and (8, 141)

Finding the slope:

m = (141-116)/(8-4) = 25/4 = 6.25

Then, finding y-intercept:

116 = 6.25*4 + b
b = 116 - 25 = 91

So the line is:

y = 6.25x + 91

Note: This is approximate best fit graph and it is attached as well. Exact formula for the line is built by using different method and is very close to the one above

4 0

4 years ago

Chad washes windows after school to make some extra money. He charges $5.50 to wash each window. If the customer provides the su

mash [69]

Answer:

C. 5.5 = 27.5

Step-by-step explanation:

The customer did not provide any supplies which means that the number 3.25 should not even be apart of the answer choice because it is not being deducted.

5.50 multiplied by how many widows (w) are washed should equal 27.50

Therefore C. 5.5 = 27.5 is the answer

6 0

3 years ago

Write it as an equation:

IgorC [24]

Let the first number be x and second number be y.
$x^{2}$ + (3-2y) = 129
I believe this is what your looking for.
For further help, Please ask!
And if you think I helped, Mark as the brainliest! Thankyou!

4 0

3 years ago

Read 2 more answers