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allochka39001 [22]
3 years ago
11

Solve for a.

Mathematics
2 answers:
masya89 [10]3 years ago
5 0
A + (-7) is the same as a - 7, so you could rewrite it as
a - 7 = -17
+ 7
a = -10
So your answer is a = -10, I hope this helps!
alina1380 [7]3 years ago
5 0

Answer:

-10

Step-by-step explanation:

just took the test

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The area of a circle is 43.25cm2.<br> Find the length of the radius rounded to 2 DP.
Monica [59]

Answer:

3.71 cm

Step-by-step explanation:

Hi there!

Area of a circle equation: A=\pi r^2 where r is the radius

Plug in the area 43.25 cm²

43.25=\pi r^2

Divide both sides by π to isolate r²

\frac{43.25}{\pi} =\frac{\pi r^2}{\pi} \\\frac{43.25}{\pi}=r^2

Take the square root of both sides to isolate r

\sqrt{\frac{43.25}{\pi}} =r\\3.71=r

Therefore, the length of the radius rounded to 2 decimal points is 3.71 cm.

I hope this helps!

8 0
3 years ago
5. What is the measurement of each angle?
Alexxandr [17]

Answer:

x=14

Step-by-step explanation:

The sum of a interior angle is 180°

(7x-11)+(2x-3)+(5x-2)°=180°

7x+2x+5x=180+11+3+2

14x/14=196/14

x= 14

Hope this answers your question!! :)

6 0
2 years ago
SOLVE<br> 3x²-7x-12=0<br> correct answer to 2 decimal places
Bas_tet [7]

Is this what are you looking for??

5 0
3 years ago
How does sin 30degrees compare to sin -30degrees?
KiRa [710]

The sine function is an odd function, so the sine of -30° is the opposite of the sine of 30°.

sin(30°) = 1/2

sin(-30°) = -1/2

The sine of 30° is greater than the sine of -30°.

7 0
3 years ago
there are 12 beads on Mrs. Hatches bracelet. 8 of the beads are purple and 4 of the beads are gray. what percentage is purple?
dexar [7]
It would be 75% or 3/4 4 goes into 12 3 times
6 0
2 years ago
Read 2 more answers
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