Evaluate the expression when y=6 y²-9y-7

Answers

Answer 1

Answer:

Answer:

The answer would be Y= 5 ± √67 / 6

Step-by-step explanation:

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An airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 mph. If the average airspeed for the entire flight was 350 mph, which of the following equations could be used to find x ? A. x + 325 = 2(350)
B. x + 7(325) = 15(350)
C. 8x – 7(325) = 350
D. 8x + 7(325) = 2(350)
E. 8x + 7(325) = 15(350)

Answers

E. 8x+7(325)=15(325)

It would include the 8 hrs. of x miles per hour and the 7 hrs. of 325 miles per hour, giving the total miles. Then, as you eliminate, you can find out what (x) is.

A type of number that includes rational and irrational numbers is ____

Answers

Answer:

Real number

Step-by-step explanation:

Those are the Real numbers.

Real numbers (R) are the conjoint of Rational Numbers (Q) - those than can be written as a fraction, e.g., 4/3, 80/456, etc. - and Irrational Numbers (I) - those that CAN'T be represented by a fraction, e.g., pi number.

So R = Q ∪ I

Aiden wants to find the mass of a bowling ball. Which unit should he use ?

Answers

kilograms or pounds, because a bowling is heavy.

Aiden should use pounds. A kilogram is around 2 pounds, and pounds are not too big and too small of a unit to use.

Write an equation in standard form for:
A circle with center (0,0) passing through (-3,4).

Answers

First, you use the two points to give you a length, and this will serve as our radius. So,
Length = ((4-0)^2+(-3-0)^2)^1/2
Length = (4^2-3^2)^1/2
Length = (16+9)^1/2
Length = 25^1/2
Length = 5 units.
Then, we can use the co-ordinates to figure out the other parts of the circle's equation, as the equation of a circle follows the pattern:
"X^2+Y^2+2GX+2FY+C=0",
the co-ordinates for the centre is (-G,-F) and another way to find the length of the radius is "(G+F-C)^1/2". So, we find out that G and F are 0, and so far we have
"X^2+Y^2+C=0" We can find C by using the second radius formula and our length. So:
(0+0-C)^1/2=5, and hence the square root of -C is equal to five. By squaring both sides we find that C=-25. The circle's final equation is:
"X^2+Y^2-25=0"

4. A marathon is 42.195 km, how many miles is this

Answers

Answer:

26.2244 mi

Step-by-step explanation:

Step 1: Find conversion

1 mi = 1.609 km

Step 2: Use Dimensional Analysis

$42.195 \hspace{2} km (\frac{1 \hspace{2} mi}{1.609 \hspace{2} km} )$

26.2244 mi

42.195 km = 26.219 miles

1,000^8=10^w what does w equal