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blagie [28]
3 years ago
14

I have no clue how to answer this or where to start

Mathematics
2 answers:
DerKrebs [107]3 years ago
6 0
It’s quite simple. Take the total percentage of people from this- 25*2 and add 43. It’s 93%
Andrew [12]3 years ago
5 0
You can add up the percentages. When doing this, I am also thinking that there are 100 residents in all.
From 600 to 649, there are 25 people or 25%.
From 650 to 699, there are ABOUT 45 people or 45% (43 people)
From 700 to 749, there are 25 people or 25%.
Let's add it up.
25+25+43
93
Letter A, 93%.
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NEED HELP Find values for a, b, c, and d so that the following matrix product equals the 2X2 identity matrix. Explain or show ho
ehidna [41]

We want to find the values of a, b, c, and d such that the given matrix product is equal to a 2x2 identity matrix. We will solve a system of equations to find:

  • b = 1
  • a = -1
  • c = -2
  • d = -1

<h3>Presenting the equation:</h3>

Basically, we want to solve:

\left[\begin{array}{cc}-1&2\\a&1\end{array}\right]*\left[\begin{array}{cc}b&c\\1&d\end{array}\right] = \left[\begin{array}{cc}1&0\\0&1\end{array}\right]

The matrix product will be:

\left[\begin{array}{cc}-b + 2&-c + 2d\\a*b + 1&a*c + d\end{array}\right]

Then we must have:

-b + 2 = 1

This means that:

b = 2 - 1 = 1

  • b = 1

We also need to have:

a*b + 1 = 0

we know the value of b, so we just have:

a*1 + b = 0

  • a = -1

Now the two remaining equations are:

-c + 2d = 0

a*c + d = 1

Replacing the value of a we get:

-c + 2d = 0

-c + d = 1

Isolating c in the first equation we get:

c = 2d

Replacing that in the other equation we get:

-(2d) + d = 1

-d = 1

  • d = -1

Then:

c  = 2d = 2*(-1) = -2

  • c = -2

So the values are:

  • b = 1
  • a = -1
  • c = -2
  • d = -1

If you want to learn more about systems of equations, you can read:

brainly.com/question/13729904

4 0
3 years ago
how much would 500 invested at 4% interest compounded continuously be worth after 7 years? round your answer to the nearest cent
vladimir1956 [14]

Answer: the answer is 661.55

Step-by-step explanation:

interest formula: F = Pe^(rt)

4 0
1 year ago
The volume of a rectangular prism is given by the expression 2x^4+2x^3-4x^2-4x. Write the volume as the product its dimensions.
telo118 [61]
<h3>Answer:  2x(x^2-2)(x+1)</h3>

=========================================================

Explanation:

First factor out the GCF 2x

2x^4+2x^3-4x^2-4x

2x*x^3+2x*x^2-2x*2x-2x*2

2x(x^3 + x^2 - 2x - 2)

Then let's factor the expression inside the parenthesis using the factor by grouping method

x^3 + x^2 - 2x - 2

(x^3 + x^2) + (- 2x - 2)

x^2(x + 1) - 2(x + 1)

(x^2 - 2)(x+1)

We see that x^3 + x^2 - 2x - 2 factors to (x^2-2)(x+1)

Overall, the original expression fully factors to 2x(x^2-2)(x+1)

length = 2x

width = x^2-2

height = x+1

The order of length, width, and height doesn't matter.

7 0
2 years ago
. 7/8 = /48<br> A. 6<br> B. 1<br> C. 13<br> D. 42
hodyreva [135]
 7/8=x/48

x=(7/8)48
x=(7)(48/8)
x=(7)(6)
x=42
                D.42

4 0
3 years ago
PLEASE HURRY I HAVE A LITTLE BIT OF TIME TO TURN IT IN
Elena L [17]

Answer:

4.25-5 minutes

Step-by-step explanation:

Its shown in the graph and table that the speed was 0 between those times.

7 0
3 years ago
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