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

Answer 1
Answer: 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.

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Write the standard form equation of the circle( 7,-5)

Answers

Answer:

(x-7)²+(y+5)²=25

Step-by-step explanation:

The standard form of a circle is (x-h)²+(y-k)²=r²

(h,k) is the center

r is the radius

h=7

k=-5

r=5

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(x-7)²+(y+5)²=25

Rachel told mariana that if she rolls two number cubes 100 times she will never get aproduct of 23 mariana toldbher that she cant be sure. whos right? explain

Answers

rachel is right because nothing under the number 100 can be multiplied to get the product of 23 

Answer:

Rachel is right.

Step-by-step explanation:

You cannot get over 12 when you roll two regular dice. 6 Is the highest number, so if you roll two 6's, the highest you can roll is a 12.

Solve for x: −2x + 5 < 7

Answers

-2x + 5 < 7

-2x + 5 < 7
        -5     -5          deduct 5 from both sides
-2x       < 2
÷ -2        ÷ -2         divide both sides by negative 2. Because of the division 
 x          > -1          using a negative number, the sign is then reversed.
                             from < it becomes >.

The value of x should be greater than -1. It can be 0, 1, 2, so on... 

To check: Revert back to the original sign which is <.

x = 1
-
2x + 5 < 7
-2(1) + 5 < 7
-2 + 5 < 7
3 < 7

Solve each system by elimination:
10x+8y= -18
8x+8y= -24

Answers

Answer:

Step-by-step explanation:

10x + 8y = -18

-8x - 8y = 24

2x = 6

x = 3

8(3) + 8y = -24

24 + 8y = -24

8y = -48

y = -6

(3, -6)

(3,-6) would be the answer to this question

Two times x divide five

Answers

Answer:

2x/5

Step-by-step explanation:

Find the simplified form of (t^4/10y^4)^-4

Answers

The answer is [(10,000*y^16)/t^16]. At first, you have to distribute the exponent -4 to the numerator and denominator by virtue of the law of exponent, (a/b)^n = [(a^n)/(b^n)]. After distribution, you get (t^-16)/[(10^-4)*(y^-16)]. To simplify the negative exponent, follow the law of exponent: a^-m = 1/a^m. Thus, you now have [(10^4)*(y^16)]/(t^16). Hence, the answer is [(10,000*y^16)/t^16].