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3 years ago

8

Nathan is jogging on a circular trail in a state park. The diameter of the trail is 650 meters. What approximate distance ( circ

umference) does Nathan cover in one lap around the park

1 answer:

erica [24]3 years ago

3 0

If using the radius, you would multiply the radius by 2*pi, to calculate the circumference, which should be the same as the answer i got.

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X²+8x-84=0 <br><br>Formúla General

Brums [2.3K]

Answer:

$x_{1} =-14\\\\x_{2} =6$

Step-by-step explanation:

$x^{2} +8x-84=0\\\\x=\dfrac{-b \pm \sqrt{b^{2}-4ac } }{2a} \\\\a=1; \: \: b=8; \: \: c=-84\\\\x=\dfrac{-8 \pm \sqrt{8^{2}-4 \cdot 1 \cdot (-84) } }{2 \cdot 1}=\dfrac{-8 \pm \sqrt{400 } }{2}=\dfrac{-8 \pm20}{2} =-4 \pm 10\\\\x_{1} =-14\\\\x_{2} =6$

8 0

3 years ago

Select all quantities that are proportional to the diagonal length of a square.

horsena [70]

Answer:

B. Perimeter of a square and

C. Side length of a square

Step-by-step explanation:

if n= side length of square then

Area of square is $n^{2}$
Perimeter of a square is 4×n
diagonal length of a square is $\sqrt{2}$ × n

Thus,

Perimeter of square can be expressed as

$2\sqrt{2}$ ×diagonal length of a square

Side length of a square can be expressed as

$\frac{1}{\sqrt{2} }$ ×diagonal length of a square

but Area of square is

$\frac{1}{\sqrt{2} }$ ×n×diagonal length of a square

As a Result, Area of square is <em>also dependent of the value n</em>, wheras in other cases it is <em>a proportion of diagonal length of a square</em>

5 0

3 years ago

Molly has $60 in a savings account that earns 5% simple interest annually. How much interest will she earn in 6 months?

mrs_skeptik [129]

Answer:

The interest is $1.5 and the amount is $61.5.

Step-by-step explanation:

3 0

2 years ago

I need help with this math problem!!

Vesnalui [34]

In order to find which one is or isn't, you need to solve for the value of 'x'.
2x + 15 = 35
2x = 20
x = 10

Substitute x =10, into equation. If each side are not the same (i.e. 0=2), then that's the equation that is not equivalent,

Answer is B
Double check this. Chur! :)

Hope this makes sense.

4 0

3 years ago

Mai drove 260 miles using 12 gallons of gas. At this rate, how many gallons of gas would she need to drive 286 miles

Paraphin [41]

Find the unit rate which is 260/12 which is 21 and 2/3 now divide 286 by 21 and 2/3.

7 0

3 years ago