Answer:
She ran 5 laps
Step-by-step explanation:
Why? Because with each lap stating to be one and a half miles; you first and only step is to divide, seeing how each time you put 1 1/2 into the value of this 7 1/2 miles, you got a lap each time.
you divide 7 1/2 by 1 1/2,
this results in getting, 5
Answer:
Null Hypothesis
H₀ : P = 3.8
Alternative Hypothesis
H₁: P > 3.8
Step-by-step explanation:
<u><em>Explanation</em></u>:-
<u><em>Null Hypothesis</em></u> :-
The single statistic, H₀ will be that the sample statistic
H₀ : There is does not differ significantly from hypothetical parameter values
H₀ : P = 3.8
<u><em>Alternative Hypothesis:</em></u>
The statistic , H₁ will be the sample statistic
H₁: There is differ significantly from hypothetical parameter values
H₁: P > 3.8
Answer:
124.254 pounds.
Step-by-step explanation:
Since 20 total gallons are needed, the amount of 10% solutions can be x and the amount of 20% solutions can be (20-x) since they add up to 20. In addition, the 17% solution has 20 gallons. Putting this into an equation, we get that 10% is 0.1 (by moving the decimal 2 spots to the left) , 0.2=20%, and 0.17=17%. With that information, we can determine that 10%*x+20%*(20-x)=20*0.17 due to that with 20 gallons of the 27% solution, we need a certain amount of solution. For every gallon, we add 0.17 of the solution, so we have 20*0.17. Similarly, we want that total amount to be represented by the amount of 20% + the amount of 10%.
0.1x+0.2(20-x)=0.1x+4-0.2x=-0.1x+4 using the distributive property
-0.1x+4=20*0.17=3.4. Subtract 4 from both sides to get -0.1x=-0.6, and multiply both sides by -10 (to separate x) to get x=6. Therefore, the amount of 10% solution is 6 gallons and the amount of 20% solution is 20-5=14 gallons
Answer: 150-x=63$
Step-by-step explanation:
to solve most missing number equations using addition or subtraction its usually pretty simple
1. figure out the first number. the first number is usually the goal amount. so 150
2. were do i put x? in an equation 150-63 would equal the amount she needs. so when you subtract x from 150 you'd get 63. you already know the goal number 150 goes first and the equation equals 63 so x is going to be whats subtracted from 150
3. put it all together 150(goal)-x(unknown number)=63(the amount she already had)
4.solve 150-87=63
5.check your work 150-63=87
