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timofeeve [1]
3 years ago
15

The expression 60 ⋅ 1. 2 t 60⋅1.2 t 60, dot, 1, point, 2, start superscript, t, end superscript models the number of nano-relate

d patents granted in the US as a function of years since 1991 19911991. What does 60 6060 represent in this expression? Choose 1 answer: Choose 1 answer: (Choice A) A The first nano-related patents were granted 60 6060 years before 1991 19911991. (Choice B) B There were 60 6060 nano-related patents granted in 1991 19911991. (Choice C) C The number of nano-related patents granted is multiplied by 60 6060 each year. Show Calculator
Mathematics
1 answer:
mamaluj [8]3 years ago
5 0

Answer:

B. There were 60 nano-related patents granted in 1991

Step-by-step explanation:

In the expression:

60⋅1.2^t

t is years after 1991, that is, in the year 1993, t = 2

60 is the value of the expression at t = 0, then it represents the amount of nano-related patents granted in 1991

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Solve the quadratic equation 4x2 − 121 = 0. Verify your answer using a difference-of-squares factoring method.
Alenkasestr [34]

Answer:

Option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

Step-by-step explanation:

Given quadratic equation is 4x^2-121=0

To write the given quadratic equation by using a difference-of-squares factoring method:

4x^2-121=0

The above equation can be written as

4x^2-11^2=0

(2x)^2-11^2=0

The above equation is in the form of difference-of-squares

Therefore the given quadratic equation can be written in the form of difference-of-squares

by factoring method is (2x)^2-11^2=0

(2x+11)(2x-11)=0 (which is in the form a^2-b^2=(a+b)(a-b) )

2x+11=0   or   2x-11=0

x=\frac{-11}{2}    or   2x=11

x=\frac{-11}{2}    or   x=\frac{11}{2}

x=\pm \frac{11}{2}

Therefore option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

5 0
3 years ago
Find the product (x-y) (8x+y)
Schach [20]
89+6 
x - y 
^ - ^
3 - 9 I think that's the answer I'm not too sure because you didn't provide me your answer but hope this helps .

8 0
3 years ago
15. Write the slope-intercept form of the line described in the following:Parallel to 4x + 5y=20and passing through (12,4)
Amiraneli [1.4K]

Problem

Write the slope-intercept form of the line described in the following:

Parallel to 4x + 5y=20

and passing through (12,4)

Solution>

For this case we need to have the same slope, and if we write the equation given we see:

5y = 20 -4x

y = 4 -4/5 x

then the slope m = -4/5

and we also know a point given x= 12, y= 4 and we can do the following:

4 = -4/5 (12) +b

4 = -48/5 + b

And if we solve for the intercept we got:

b= 4 +48/5= -28/5

And our equation would be given by:

y = -4/5 x -28/5

3 0
1 year ago
On a piece of paper, use a protractor to construct a triangle with angle measures of 100° and 30°.
yanalaym [24]

The third angle measures 50° and all sides have different lengths.

<h3>What is a triangle?</h3>

A triangle is a polygon with three sides and three angles. Types of triangles are<em> isosceles, equilateral, scalene and right angled.</em>

The sum of angles in a triangle is 180 degrees.

A triangle with angle measures of 100° and 30°, let x represent the third angle, hence:

x + 100 + 30 = 180° (sum of angles in a triangle)

x = 50°

Also, all sides have different lengths since all the angles are different.

Find out more on triangle at: brainly.com/question/2644832

8 0
3 years ago
Find the value of y that makes the equation y = -2x + 4 true when x = 1.
Crazy boy [7]
Y = 2, so C. Have a good day :)
3 0
3 years ago
Read 2 more answers
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