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sladkih [1.3K]
3 years ago
15

Problems 40-45 I need assistance with​

Mathematics
1 answer:
Greeley [361]3 years ago
7 0

40. Multiply each row in the first matrix by each column in the second matrix.

The answer would be C.

41. E. Matrix

42. D. Transformations

43. C. determinants

44. B. equal matrices

45. A. Zero matrix

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Find the value of x so that the polygons have the same perimeter.
Novosadov [1.4K]

Answer: x=4

Step-by-step explanation:

The perimeter´s formula for this kind of polygons is

The triangle perimeter would be:

(x+2)+(x+3)+(x+3)

And the rectangle:

(x+2)+(x+2)+x+x

For them to have the same value, we should equal them:

(x+2)+(x+3)+(x+3)=(x+2)+(x+2)+x+x

Working with this:

3x+8=4x+4

x=4

4 0
2 years ago
Describe the motion of a particle with position (x, y) as t varies in the given interval. (For each answer, enter an ordered pai
DerKrebs [107]

Answer:

The motion of the particle describes an ellipse.

Step-by-step explanation:

The characteristics of the motion of the particle is derived by eliminating t in the parametric expressions. Since both expressions are based on trigonometric functions, we proceed to use the following trigonometric identity:

\cos^{2} t + \sin^{2} t = 1 (1)

Where:

\cos t = \frac{y-3}{2} (2)

\sin t = x - 1 (3)

By (2) and (3) in (1):

\left(\frac{y-3}{2} \right)^{2} + (x-1)^{2} = 1

\frac{(x-1)^{2}}{1}+\frac{(y-3)^{2}}{4} = 1 (4)

The motion of the particle describes an ellipse.

7 0
2 years ago
If the regular selling price of a silk scarf is $49 and the markdown rate is 38%, what is its sale price?
Aleks04 [339]

Answer:

$30.38

Step-by-step explanation:

To find the sale price, find the percentage you pay after the discount. The discount is for 38%. So you pay 62%.

The selling price of the scarf will be 0.62(49) = 30.38

4 0
3 years ago
X+y=11 and 22X+15y=228
Lady_Fox [76]
X+y=11
22x+15y=228

y=11-x
22x+15y=228
22x+15(11-x)=228
22x+165-15x=228
7x+165=228
7x=63
x=9

9+y=11
y=2

The solution to the system of equations is (9,2)
6 0
3 years ago
What is the measure of Z Z?<br>70°<br>110°<br>105°<br>35°​
Jobisdone [24]

Answer:

z = 110

Step-by-step explanation:

z + 35 + 35 = 180

z+70=180

z = 110

8 0
2 years ago
Read 2 more answers
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