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Serggg [28]
3 years ago
15

Last Tuesday​, a parking lot had 80 cars. Of those 80 ​cars, 40​% were tan​, 20 were silver​, and the rest were black. What perc

ent of the cars were black​?
Mathematics
1 answer:
stepladder [879]3 years ago
7 0

Answer:

Step-by-step explanation:

35%+28%=63%

37% of the cars were tan

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Which of the following represents a solution to the equation d3 - 343?
Levart [38]
I don’t see any multiple choice but d3 -343 is factored as (d-7)(d^2+7d+49)
3 0
3 years ago
The 3 × 3 matrix P satisfies the matrix equation P^2 = P.
riadik2000 [5.3K]

Answer:  The answers are given below.

Step-by-step explanation:  Given that a  3 × 3 matrix P satisfies the matrix equation P² = P.

We are to

(a) find the possibilities for the determinant of P.

(b) explain the reason behind there are no other possibilities.

(c) give an example of P, for each possible determinant.

(a) According to the given information, we have

P^2=P\\\\\Rightarrow P^2-P=0\\\\\Rightarrow P(P-I)=0\\\\\Rightarrow P=0,~~~P=I.

So, P can be either a zero matrix of order 3 or an identity matrix of order 3.

If P = 0, then det(P) = 0     and     if P = I, then det(P) = 1.

Therefore the possible determinants of P are 0 and 1.

(b) There can be any other determinant other than 0 and 1, because if so, then the given equation P² = P will not be satisfied.

(c) If |P| = 0, then the matrix P can be can be of the form as follows:

P=\left[\begin{array}{ccc}0&0&0\\0&0&0\\0&0&0\end{array}\right] .

If |P| = 1, the the matrix P can be of the form as follows :

P=\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right] .

Thus, all the parts are answered.

4 0
3 years ago
Which equation represents a linear function? Equation 1: y = 2x + 1 Equation 2: y2 = 3x + 1 Equation 3: y = 5x5 − 1 Equation 4:
Andreyy89
Equation 1 represents a linear function.
6 0
3 years ago
Read 2 more answers
G(x)=x^3+5x h(x) =x+3 find (g+h)(x)
exis [7]

(g+h)(x) = x^3+6x+3

Step-by-step explanation:

The operations on functions can be performed as they are performed on polynomials

The addition of functions is used in the given question

Given

g(x)=x^3+5x\\h(x)=x+3

We have to find:

(g+h)(x)=g(x)+h(x)\\=x^3+5x+x+3\\=x^3+6x+3

So,

(g+h)(x) = x^3+6x+3

Keywords: Functions, operations on functions

Learn more about functions at:

  • brainly.com/question/4892332
  • brainly.com/question/4924817

#LearnwithBrainly

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3 years ago
The solution to a system of three equations in three variables is__one point.
Firdavs [7]
The answer for this is B because
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