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il63 [147K]
2 years ago
5

Write the word sentence as a equation and solve it .

Mathematics
1 answer:
svet-max [94.6K]2 years ago
8 0


2.1-2p= -4.7

they said the difference of 2.1 and twice a number p. which I'm assuming letter p, but anyway. difference means subtraction and twice mean multiplication so 2p

that's why we have 2.1-2p= -4.7

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The figure shows a bridge support, a cable, and the roadway of a bridge.
Murljashka [212]

Answer:

soln,

feet × feet tall

170×80

13,600

3 0
1 year ago
Two college instructors are interested in whether or not there is any variation in the way they grade math exams. They each grad
AlekseyPX

Answer:

Since the calculated value of F = 1.4397 is less than the critical value of

F (9,9)= 2.4403 we conclude that the  first instructor's variance is smaller and reject H0.

Step-by-step explanation:

1)Formulate the hypothesis that first variance is equal or greater than the second variance

H0: σ₁²≥σ₂²  against the claim  that the first instructor's variance is smaller

 Ha: σ₁²< σ₂²

2) Test Statistic F= s₂²/s₁²

F= 84.8/ 58.9=  1.4397

3)Degrees of Freedom = n1-1= 10-1= 9  and n2 = 10-1= 9

4)Critical value   at 10 % significance level= F(9,9)= 2.4403

5)Since the calculated value of F = 1.4397 is less than the critical value of

F (9,9)= 2.4403 we conclude that the  first instructor's variance is smaller and reject H0.

4 0
3 years ago
Given the following table, determine the missing value. Growth Factor 1.13 ? 1.28 1.97 Percent 13% 256% 28% 97%
omeli [17]
To get the growth factor from a percentage increase, express the percentage as a decimal, then add 1.
  256% = 2.56
  2.56 + 1 = 3.56

The appropriate choice is ...
  c. 3.56
5 0
3 years ago
Read 2 more answers
Think of a situation when someone would need to make a measurement with extreme precision. Describe the setting, why the measure
makkiz [27]

Answer:

Ok, suppose you want to create a battery that fits exactly in the hole that is already created for an electric device, like a cellphone for example.

If the battery is slightly bigger, it will not enter the socket, and the battery will be a loss in time and resources.

If the battery is slightly smaller, it will move when it is in the socket, so the cell phone will shut down randomly when you move it, then this battery is also a loss in time and resources.

So you need to measure exactly the socket in order to make a battery that fits exactly inside of it with very good precision.  

This example can be extended for any electronic piece that you need to fit in a given space (for example in microtechnology, the precision of the measures is must be extreme because working with those things is really expensive and you can not mess up with the dimensions of the pieces)

5 0
2 years ago
natalie guessed on the last four true or false questions on her math quiz. what is the probability that she got all four quiz qu
Verizon [17]
Each question is either true or false, so the sample space is 2, true and false, two states only.

what's the probability she got one correct, well, the favorable outcomes is 1, possible outcomes is 2, so 1/2.

what's the probability that she got all four correct, we simply multiply the probability of each,


\bf \cfrac{1}{2}\cdot \cfrac{1}{2}\cdot \cfrac{1}{2}\cdot \cfrac{1}{2}\implies \cfrac{1}{16}\implies 0.0625\qquad or\qquad 6.25\%
7 0
3 years ago
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