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kirill115 [55]
3 years ago
10

Which system of equations is equivalent to the system of equations shown? 2x + 5y = -2 4x + 7y = 8 A) 6x - 12y = 6 and 4x - 10y

= 4 B) 6x - 12y = 6 and 4x + 10y = -4 C) 6x + 12y = 6 and 4x - 10y = 4 D) 6x + 12y = 6 and 4x + 10y = -4
Mathematics
1 answer:
ankoles [38]3 years ago
7 0
The correct anwerr is d
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What is the scale factor for pre-image IJKH to image MNOL?
solniwko [45]

Answer:

Step-by-step explanation:

Given are two rectangles MNOL and IJKH

MNOL is the image and IJKH is the preimage.

OBviously similarity is preserved between these.

Hence sides will be proportional

i.e. l1/l2 = w1/w2 = Scale factor k

This can also be written as

Scale factor square = k^2=\sqrt{ \frac{areaI}{area2} }

Scale factor = square root of ratio of rectangle areas

Find ratio as

\frac{375}{135} =\frac{25}{9}

k = Scale factor = square root of the above fraction

=\frac{5}{3}

5 0
4 years ago
Sin(3pi over 4) = _____
OlgaM077 [116]
If you're using the app, try seeing this answer through your browser:  brainly.com/question/2790456

______________


\mathsf{sin\!\left(\dfrac{3\pi}{4}\right)}\\\\\\ =\mathsf{sin\!\left(\dfrac{3\cdot 180^\circ}{4}\right)}\\\\\\ =\mathsf{sin(135^\circ)}\\\\ =\mathsf{sin(180^\circ-135^\circ)}

=\mathsf{sin(45^\circ)}\\\\ =\mathsf{\dfrac{\sqrt{2}}{2}}\quad\longleftarrow\quad\textsf{this is the answer.}


I hope this helps.=)


Tags:  <em>sine sin common angles trig trigonometry </em>

8 0
3 years ago
Write three expressions that are equivalent to 2^6
aleksandr82 [10.1K]

Answer:

well 2^6 = 64 so 8x8, 32x2 and 16x4 would all be correct

4 0
3 years ago
a mountaineer climbed 1,000 feet at a rate of x feet per hour, he climbed and additional 5,000 feet at a different rate. this ra
marshall27 [118]

A mountaineer climbed 1000 feet at a rate of x feet/hour

 1000 = x ( t 1 )         eq1

  5000 = X ( t 2)        eq2     ( he climbed additional at different rate )

the rate was 10 feet / hour less than twice the first rate

 X   = 2x - 10             eq3

take eq1 and eq 2

( total time = t 1 +  t 2 =   T)

T = 1000/x  + 5000/X

but X = 2x-10

T = 1000/x   +  5000/( 2x -10)

T = 1000/x   +  5000/( 2(x-5))

T  = 1000/x   +    2500 /  (x-5)



3 0
3 years ago
Read 2 more answers
Helppppppppppppppppppppppppppppppp
NemiM [27]
The first answer, subtract 6 from 27, then divide by 3
4 0
3 years ago
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