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Novosadov [1.4K]
3 years ago
15

6.9 + (-5) + 4.1 = I need help with this problem big time please

Mathematics
2 answers:
QveST [7]3 years ago
8 0

Answer:

6

Step-by-step explanation:

We need to simplify this equation:

6.9 - 5 + 4.1

The reason why there is a negative sign in between 6.9 and 5 is that + and - become negative.

There is a chart that can help you with this:

+      +      =      +

+      -      =      -  

-      +      =      -  

-      -      =      +  

This will help you with BIDMAS/BEDMAS

Maru [420]3 years ago
5 0

Answer:

6

Step-by-step explanation:

6.9 - 5 = 1.9

1.9 + 4.1 = 6

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Ten thousand marbles were produced on a production line. The first 100 marbles off the line were taken and tested for roundness.
Soloha48 [4]
No, it is not. In a simple random sampling, all produced marbles should have the same probability to be taken off the line. In this case only the first 100 marbles are taken while the rest of the production batch is not randomly sampled
5 0
3 years ago
Charlie is standing 45 feet from the base of 100 foot tall tree. What is the angle of elevation from him to the kite stuck on to
galben [10]
Hey. Let me help you on this one.

In order for us to solve this problem easier, let's break it apart. We can also graph the triangle so we get visual of this problem.

I drew a quick graph for you to easier understand this question. As you can see, Charlie is standing below the tree 45 feet from it, and we need to find the unknown angle measure.

Let's form a SOHCAHTOA function which you have probably already learned in your Geometry course.

First of all let's identify our sides. The side opposite of the right triangle is a Hypotenuse, and the side that's 45 feet is adjacent, since it's adjacent to the unknown angle.

We know that we need to use Cos (Cosine) with negative power to it in order to solve this question, since we are looking for the unknown angle measure.

Let's form the function which Cos, Hypotenuse, and Adjacent side.

Cos^{-1} =45/100

Now, let's solve the left part of this function


Cos^{-1} =0.45

Awesome. You will need to use your calculator for this part. Find the value of 0.45 when negative Cosine is used on it.

Cos^{-1} =0.45
63.25631605

Awesome. Let's round this number to the closest tenth

63.3 is the rounded value we have discussed below.

Answer: 63.3 degrees is the unknown measure of the angle

5 0
3 years ago
The following data shows the weight, in pounds, of 6 bags:
77julia77 [94]

Answer:

1.3 pounds; on average, weight of a bag varies 1.3 pounds from the mean of 7 pounds

Step-by-step explanation:

the mean absolute deviation is 1.3 and the mean is 7. i just took this test today, hoped this helped:)

8 0
3 years ago
8+4 please help me IM IN A HURRY​
Alekssandra [29.7K]

Answer:

12

Step-by-step explanation:

Just add 4 more to 8 and you get 12

5 0
3 years ago
Read 2 more answers
2x-3y=1 2x+3y=2 describe the process of using addition to show that the lines are intersecting
NNADVOKAT [17]

Two lines in a plane can intersect,overlap or be parallel.When two lines intersect they have a common point which lies on both line.This is called solution of the two simultaneous equation which when graphed represent straight lines. Adding the two equations uses  Elimination method to solve for x and y. The x and y value obtained is the common point lying on both the lines.

2x - 3y = 1

+ 2x + 3y = 2  

4x =3 Or x=3/4

Substituting x value in any of the two-equation we can find the corresponding y value .

2x-3y=1

2(3/4) - 3y =1

Solving for y

y= 1/6

The point of intersection of the two lines is ( 3/4, 1/6)

Learn more about simultaneous equation here:brainly.com/question/16863577

#SPJ4

4 0
2 years ago
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