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DanielleElmas [232]
2 years ago
12

Are these right and can u help with number 4

Mathematics
2 answers:
ryzh [129]2 years ago
7 0
#2 is incorrect

Add 3.84+1.92
That will give you your answer for #2
alexdok [17]2 years ago
3 0
7/4th s should be the answer sorry if i,m wrong
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Find the exact volume of a waffle ice cream cone with a 9​-in. diameter and a height of 15 inches.
boyakko [2]

The volume of a cone is:

V_{cone}=\dfrac{1}{3}\pi r^2h, where r is base's radius, h is cone's height.

If diameter is 9 in, then radius is 4.5 in and

V_{cone}=\dfrac{1}{3}\pi (4.5)^2\cdot 15=101.25\pi.

Answer: V_{cone}=101.25\pi.

7 0
3 years ago
What is 3+0.75x=5.25-0.25 equal?
s2008m [1.1K]

3 + 0.75x = 5.25 - 0.25x

0.75x = 2.25 - 0.25x

x = 2.25

3 + 0.75(2.25) = 5.25 - 0.25(2.25)

3 + 1.6875 = 5.25 - 0.5625

4.6875 = 4.6875

They are equal

6 0
2 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
PLEASE SHOW FULL SOLUTIONS !!!!! WILL MARK BRAINLIEST FOR THE BEST ANSWER. THANK YOU AND GOD BLESS.
zhenek [66]

Answer:

a = 8

b ≠ 18

Step-by-step explanation:

y = 4x - 7

2y = ax + b

For there to be no solution, the lines (if graphed) should be parallel meaning that their slopes are equal but the y-intercepts are different

y = mx +b is the equation of a line where m is the slope and b is the y-intercept

Multiply the first equation by 2

2y = 8x - 14

2y = ax + b

So a has to equal 8

b can be anything except 14 (otherwise the lines would be the same)

4 0
2 years ago
Read 2 more answers
When two variables have an inverse relationship, the slope is?
Temka [501]
When two variables have an inverse relationship, the slope is negatively correlated.
6 0
3 years ago
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