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kogti [31]
3 years ago
13

Which ordered pair is a solution of the equation?

Mathematics
2 answers:
beks73 [17]3 years ago
7 0

Answer:

D

Step-by-step explanation:

Just plug the numbers in.

y=-2x-5

(Plug in 1,7)

7=-2(1)-5

7=-7

So not (1,7)

y=-2x-5

(Plug in 2,-7)

-7=-2(2)-5

-7=-9

So not (2,-7)

Which means none of these answers are correct.

The only correct solutions to this equation are (0,-5) and (1,-7)

nevsk [136]3 years ago
6 0

Answer:

D

Step-by-step explanation:

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Find the value of the length <br> x<br> rounded to 1 DP.
bagirrra123 [75]

Length of x is 98.2 m

<u>Step-by-step explanation:</u>

Step 1:

Use the trigonometric ratio tan 27° to find the common side of both the right angled triangles.

tan 27° = opposite side/adjacent side = opposite side/9

∴ Opposite side = 9 tan 27° = 9 × - 3.27 = -29.46 m

Step 2:

Use this side and trigonometric ratio cosine to find the value of x.

cos 49° = adjacent side/x = -29.46/x

∴ x = -29.46/cos 49° = -29.46/0.30

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5 0
3 years ago
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Answer:

422.39 sq cm

Step-by-step explanation:

Find the area of the circle and subtract the area of the rectangle from it.

Circle area: pi*12^2, 144pi sq cm

REctangle area: 10*3=30sq cm

144pi-30≈422.39

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3 years ago
Simplify the following expression.
son4ous [18]

Answer:

C. log 9

Step-by-step explanation:

Hope this helped!

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A new car is purchased for 19900 dollars. The value of the car depreciates at 7.5% per year. What will be the value of the car a
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Answer:

$10665,64

Step-by-step explanation:

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Work out the value of 5x-2y when x=-2 and y=-3
max2010maxim [7]
I guess this how it would go
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So your answer should be <span>−4</span>

3 0
3 years ago
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