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3 years ago

What is the quotient a-3/7÷3-a/21

Mathematics

2 answers:

Svetach [21]3 years ago

8 0

Its -3 I just took the test

Airida [17]3 years ago

3 0

I wish you were using parentheses here. I must assume (without knowing for sure) that y ou mean

a - 3/7
----------
3 - a/21

The LCD here is 21, since 7 divides into 21 without a remainder.

Thus, multiply numerator and denominator by 21:

21a - 9
-----------
63 - a

You could leave this result as is, or you could factor out 3:

7a-3
3 ---------
63-a

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levacccp [35]

Answer:

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Step-by-step explanation:

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3 years ago

Write an equation that is perpendicular to y= 1/2x+5 and passes through (4,8)

goblinko [34]

Answer:

y = -2x + 16.

Step-by-step explanation:

The slope of the perpendicular line = -1 / slope of the given line

= -1 / 1/2 = -2.

Using the point slope form of the equation of a straight line:

y - y1 = m (x - x1)

y - 8 = -2(x - 4)

y - 8 = -2x + 8

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3 years ago

How to solve -7(x-1)^2-2 vertex form to standard form

ahrayia [7]

Expand it

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3 years ago

I need the answer ASAP please

Nastasia [14]

Answer:

9 - 3=6

Step-by-step explanation:

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2 years ago

The 2 main support rods for a barbeque grill are each 7.5 cm from the centre of the

sukhopar [10]

Answer:

58.1 cm

Step-by-step explanation:

The length of each support rod can be found using the Pythagorean theorem. The geometry can be modeled by a right triangle, such that the distance from centre is one leg and half the length of the rod is the other leg of a triangle with hypotenuse equal to the radius of the grill.

<h3>Pythagorean theorem</h3>

The theorem tells us that the sum of the squares of the legs of a right triangle is the square of the hypotenuse. For legs a, b and hypotenuse c, this is ...

c² = a² +b²

<h3>application</h3>

For the geometry of the grill, we can define a=7.5 and c=30. Then b will be half the length of the support rod.

30² = 7.5 +b²

b² = 900 -56.25 = 843.75

b = √843.75 ≈ 29.0473

The length of each support rod is twice this value, so ...

rod length = 2b = 2(29.0473) = 58.0947

Each support rod is about 58.1 cm long.

7 0

1 year ago