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creativ13 [48]
2 years ago
7

Which point has coordinates (–5, 8)?

Mathematics
1 answer:
Step2247 [10]2 years ago
8 0

Answer:

I don't know this but when I do I'll tell you :))

Step-by-step explanation:

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one tamk of gasoline has an octane rating of 140 and another tank of gasoline has an octane rating of 80. To obtain a mixture of
Zarrin [17]

Answer:

20 gallons were used from the tank with the octane rating of 80.

Step-by-step explanation:

Given : One tank of gasoline has an octane rating of 140 and another tank of gasoline has an octane rating of 80. To obtain a mixture of 60 gallons with an octane rating of 120.

To find : How many gallons should be used from the tank with the octane rating of 80?

Solution : Let x be the volume of gas whose octane rating is 140 and

y be the volume of gas whose octane rating is 80.

Then, we form the equation as:

(1) x\times140 + y\times80 = 60\times120

140x+80y = 7200

or  7x+4y = 360 .........[3]

(2) x + y = 60

Now multiply equation (2) by 4  

4x + 4y = 240 ...........[4]

Subtract (4) from (3)  

7x+4y-4x-4y=360-240

3x=120

x=\frac{120}{3}

x=40

Put x in equation [4] we get,

4(40) + 4y = 240

160 + 4y = 240

4y = 80

y=\frac{80}{4}

y=20

Therefore, x=40 and y=20

So, 20 gallons were used from the tank with the octane rating of 80.






7 0
3 years ago
The random variable KK has a geometric distribution with mean 16. Which of the following is closest to the standard deviation of
asambeis [7]

Answer:

E 240

Step-by-step explanation:

Geometric Distribution mean = (1- p) / p

16 = (1 - p) / p

16p = 1 - p  ;  17p = 1 ; p = 1/17 = 0.058  

Standard Deviation = (1 - p) / p^2

= (1 - 0.058) / (0.058)^2

0.942 / 0.003364

= 280 , closest to 240

5 0
3 years ago
Anyone good in Geometry
Dominik [7]

Answer:

10

Step-by-step explanation:

6x = 60

4 0
3 years ago
Read 2 more answers
12 &lt; k + 11<br><br><br> The solution of the inequality is <br><br> (pls answer fast)
Free_Kalibri [48]

Answer:

Solve for K by simplifying both sides of the inequality, then isolating the variable.

Inequality Form:

k > 1

<u>Interval Notation</u>:

(1, ∞)

Step-by-step explanation:

4 0
3 years ago
A study finds that 80% of the local high school students text while doing homework. Ten students are selected at random from the
AysviL [449]

Answer:

Step-by-step explanation:

6 0
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