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dimaraw [331]
2 years ago
11

Identify the augmented matrix that represents this liner system 2x-3y=4 5x+7y=39

Mathematics
1 answer:
Lisa [10]2 years ago
7 0

Answer:

its c edg 2020

Step-by-step explanation:

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In ΔCDE, the measure of ∠E=90°, the measure of ∠C=39°, and EC = 67 feet. Find the length of CD to the nearest tenth of a foot.
Harlamova29_29 [7]

Answer:

86.2129≈86.2 feet

Step-by-step explanation:

4 0
2 years ago
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Jack weeded 1/9 of the garden, and Jill weeded 1/3 of the garden. How much of the garden did they weed altogether ?
Nataliya [291]
They weeded 4/9ths of the garden.
3 0
2 years ago
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Type the slope-intercept equation
natulia [17]

Answer:

y= -2x +1

Step-by-step explanation:

<u>slope- intercept form</u><u>:</u>

y= mx +c, where m us the gradient and c is the y-intercept.

Let's find the value of m first using the gradient formula.

Gradient= \frac{y1 - y2}{x1 - x2}

m =  \frac{ - 3 - 3}{2 - ( - 1)}  \\ m =  \frac{ - 6}{2 + 1}  \\ m =  \frac{ - 6}{3}  \\ m =  - 2

y= -2x +c

To find the value of c, substitute a pair of coordinates.

When x= -1, y=3,

3= -2(-1) +c

3= 2 +c

c= 3 -2

c= 1

Thus the equation of the line is y= -2x +1.

4 0
2 years ago
A wooden plank is leaning against a wall. The bottom of the plank is 3 feet from the wall. Answer each of the following question
Nadusha1986 [10]

AB = ==> distance between the bottom of the plank; and the wall ===> 3 ft.

C ====> 49 degrees

For letter a, to solve for AC:

AC ==> HYPOTENUSE. The angle C is the OPPOSITE side of AB.

use sine :

sin A ===> opposite/hypotenuse

Solve:

sin 49 ====> 3/AC

AC ====> 3 / sin 49

AC ====> 3.96 ft.

For letter b, to solve for BC:

We are now given with the base (3 ft.); and; the hypotenuse (3.96 ft.) so we can use the Pythagorean theorem:

a^2 + b^2 = c^2

Let:

a ===> AB

b ===> BC

c ===> AC

(AB)^2 + (BC)^2 ===> (AC)^2

3^2 + (BC)^2 ===> (3.96)^2

(BC)^2 ===> (3.96)^2 - 3^2

(BC)^2 ===> 6.6816

sqrt (BC)^2 ===> sqrt 6.6816

Answer: BC ===> 2.58 ft.

Hope that helps!!!! : )

3 0
3 years ago
-7+82*78-67^6+5-4/6=?<br><br> sufferrrrrrrrrr!
mixas84 [53]

Answer:

-90458375775.7

Step-by-step explanation:

yes

8 0
2 years ago
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