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2 years ago

I really have no idea how do this so an explanation with an answer would be really helpful :)

Mathematics

1 answer:

abruzzese [7]2 years ago

8 0

Answer:

So, BC = 5.6 cm

Step-by-step explanation:

Since its a right angled triangle,

taking 62 as reference angle,

cos62 = b/h

or, cos62 = AB/BC

or, cos62 = AB/12cm

or, cos62×12cm = BC

so, BC = 5.63

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Please Answer Quick 65 Points ! !

NeTakaya

The correct answers are:

The ordered pair (7, 19) is a solution to the first equation because it makes the first equation true.

The ordered pair (7, 19) is not a solution to the system because it makes at least one of the equations false.

Further explanation:

Given equations are:

2x-y = -5

x+3y = 22

We have to check whether the given statements are true or not. In order to find that we have to put the points in the equations

Putting the point in 2x-y = -5

$2x - y = -5\\2(7) -19 = -5\\14-19 = -5\\-5 = -5$

Putting the point in x+3y=22

$7 + 3 (19) = 22\\7 + 57 = 22\\64 \neq 22$

The point satisfies the first equation but doesn't satisfy the second. So,

1. The ordered pair (7, 19) is a solution to the first equation because it makes the first equation true.

This statement is true as the point satisfies the first equation

2. The ordered pair (7, 19) is a solution to the second equation because it makes the second equation true.

This Statement is false.

3. The ordered pair (7, 19) is not a solution to the system because it makes at least one of the equations false.

This statement is true.

4. The ordered pair (7, 19) is a solution to the system because it makes both equations true.

This statement is false as the ordered pair doesn't satisfy both equations.

Keywords: Solution of system of equations, linear equations

Learn more about solution of linear equations at:

#LearnwithBrainly

5 0

4 years ago

5x-7=118 solve for the variable x

myrzilka [38]

X=25 ...... ................

5 0

4 years ago

Read 2 more answers

Is -3+3-3+3-3+3 a arithmetic?

bezimeni [28]

Answer:

$- 3 + 3 = 0 - 3 = - 3 \\ - 3 + 3 = 0 - 3 = - 3 \\ - 3 + 3 = 0$

3 0

3 years ago

Read 2 more answers

Someone please help!! I’ll give brainliest!

snow_lady [41]

Answer:

1766.3

Step-by-step explanation:

V=4 /3πr^3

= 4/3(3.14)(7.5)^3

= 4/3(3.14)(421.88)

= 4/3(1324.69)

= 1766.25

= 1766.3

I hope this is right!

3 0

3 years ago

(x^4)^3=(x^3)^4 true or false

telo118 [61]

Step-by-step explanation:

(x^4)^3=(x^3)^4 , true

=> x^(4×3) = x^(3×4) = x^12

13^4 x 13^7= (13^4)^7, false

13^(4+7) = 13^11

(13^4)^7 = 13^(4×7) = 13^28

y^5 x y^0/y^3=(y^2)^1 , true

y^5 x y^0/y^3 = y^(5+0-3) = y^2

(y^2)^1 = y^(2×1) = y^2

q^0 x q^5/q^2=(q^3)^2/q^3, true

q^0 x q^5/q^2= q^(0+5-2)= q^3

(q^3)^2/q^3 = q^(3×2-3) = q^3

6 0

3 years ago

Read 2 more answers