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Fiesta28 [93]
3 years ago
14

What is the result of subtracting the second equation from the first? \begin{aligned} -7x-y &= 0 \\\\ 7x+8y &= -6 \end{a

ligned} −7x−y=0 7x+8y=-6 ​ =0 =−6 ​
Mathematics
1 answer:
Kitty [74]3 years ago
3 0

Answer:

-14x-9y=6

Step-by-step explanation:

We are given with two equations

first equation is  -7x-y=0

second equation is

7x+8y=-6

we find the result of subtracting two equation

subtract the second equation from the first, so

first equation - second equation, multiply second equation by -1  and then add it with first equation

-7x-y=0

-7x-8y=+6

Now add both equations, we get

-14x-9y=6

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On a website, listeners rate music from 1 star to 5 stars. One song was rated 1 star by 3.5% of the listeners. There were 49 lis
defon

Answer:

1400

Step-by-step explanation:

3.5% of listeners rated the song as 1 star

49 listeners rated the song as 1 star

49 listeners = 3.5% of listeners

we want to find 100% of listeners. we can do this by multiplying both sides of the equation by 100/3.5, getting one side to 100% and the other to what it is equal to

49 * 100/3.5 listeners = 100% of listeners = 1400

3 0
2 years ago
The volume of the rectangular prism is 60x3 + 145x2 + 70x. factor to find the possible expressions for length, width and height
madam [21]
The possible dimensions of the prism will be evaluated as follows:
<span>60x3 + 145x2 + 70x
factoring out 
factoring out 5x we get:
5x(12x^2+29x+14)
factoring the quadratic we get:
5x(3x+2)(4x+7)
hence the dimensions are:
5x by (3x+2) by (4x+7)</span>
8 0
3 years ago
Read 2 more answers
ASAP ASAP ASAP asap help me​
Nataly [62]

Answer:

16

Step-by-step explanation:

We can use the Pythagorean theorem to find the  height

a^2 + b^2 = c^2 with a and b legs and c the hypotenuse

The triangle is a right triangle with legs GH and FG and hypotenuse FH

FG^2 + GH^2 = FH^2

FG ^2 + 12^2 = 20^2

FG^2 +144 = 400

Subtract 144 from each side

FG^2 +144-144 = 400-144

FG^2 =256

Take the square root of each side

sqrt(FG^2) =sqrt(256)

FG = 16

7 0
3 years ago
Read 2 more answers
As punishment for bad behavior during recess, Mrs. Busywork asked her class to multiply 10 by 1/3 five times. John, however, not
xenn [34]
It is the simplest expression which is a multiple of both of the original denominators. Then, the numerators only are added, and the result is divided by the lowest common denominator. Example. Express as a single fraction.
5 0
3 years ago
Read 2 more answers
1. The average length of all the trout in a river is 60 cm. This data summary represents a ____________________(parameter/statis
Sauron [17]

Answers:

  1. Parameter
  2. C. The students in Ms. Anderson's science class

==========================================================

Explanation for problem 1

If all we're concerned with are the trout in this river, and this river only, then we are measuring the parameter population mean value of 60 cm. Parameters always go with populations; while statistics go with samples.

A quick way to remember:

  • parameter and population both start with p
  • statistic and sample both start with s

----------------------------------------------------------

Explanation for problem 2

This question seems to be missing a key word. The portion that reads "then which is not a possible for the study?" seems to have a missing word where the blank is shown below

<em>then which is not a possible _____ for the study?</em>

I think "population" should be put into the blank. If that's the case, then choices A, B, and D are all possible populations here. They are larger than the sample of freshmen at this high school. Notice how the students in Ms. Anderson's class is a smaller set compared to the set of all freshmen at Hamilton High School. The sample must always be smaller than the population, or phrased another way, the population must always be larger than the sample.

So this is why choice C is the answer.

8 0
3 years ago
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