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Alex17521 [72]
3 years ago
15

I'm un-sure of the answer.. please help me

Mathematics
1 answer:
Assoli18 [71]3 years ago
7 0
Oh girl... that just looks like two stickers being pulled apart
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What is the value of the expression?
Kamila [148]
Must do multiplication first....
-2/5 - 3/7 x 7/10
-2/5 - 21/70 (I'll reduce 21/70)
-2/5 - 3/10
Now you have to find a common denominator and subtract
-35/50 = -7/10......is what I get
7 0
3 years ago
A line has a slope of -8 and includes the points (-10, 0) and (-9, z). What is the value of Z?
Evgesh-ka [11]

Answer:

Step-by-step explanation:

Let L be the given line, then, with a slope of -8

L :  y = -8x + b

where b is to be determined from the included point A(-10,0).

Substitute point A in L to get

0 = -8 (-10) + b

solve to get

b = -80

therefore

L : y = -8x -80

Now substitute B(-9,z) in L

z = -8(-9) - 80 = -8

6 0
2 years ago
Read 2 more answers
Some people believe that second born subjects are more intelligent (higher IQ test). Given the data, your job is to perform the
nexus9112 [7]

Answer:

C

Step-by-step explanation:

When to use regression test?

  • This is done to find the relationship between 2 variables. One dependent and one independent.

When to use Multiple regression test?

  • Extension of regression test. It is used to predict value of 1 variable when it depends on 2-3 other variables. Multivariable, basically.

When to use 1-sided t-test?

  • We check for possibility of relationship of something from one side. 1 side effect. With a hypothesis and its alternate.

When to use 2-sided t-test?

  • This is same as 1-tailed but it looks for possibility from 2sides. A hypothesis and alternate, whether less or more.

Now, Options A and B are not right since we aren't comparing 2 variables here. People believe second born subjects are more intelligent. We have to perform a test to see whether this is true or not. One sided answer. So, we will use One-sided t-test.

6 0
3 years ago
Is -5 a solution to the equation 6x +5 = 5x + 8 + 2x? Explain.
MrRa [10]

Answer:

No -5 is not the solution, But x =-3 is the solution.

Step-by-step explanation:

Given:

6x+5= 5x+8+2x

We need to find the solution for above equation we get;

Solution:

Now when we put the value of x =-5 we get

6x+5 =5x+8+2x\\\\6\times-5+5 = 5\times-5+8+2\times-5\\\\-30+5 = -25+8-10\\\\-25\neq -27

hence -5 is not the Solution for given equation.

On Solving the above equation we get;

6x+5 =7x+8

Now Combining the like terms we get;

7x-6x =5-8

Now Using Subtraction property we get;

x = -3

Hence The solution to equation is -3.

6 0
2 years ago
A sphere has a diameter of 14 units. What is the volume of the sphere in cubic units? If a cylinder has the same radius as the s
Sonja [21]
See the attachment for answer:
V≈<span>1436.76 units cube (sphere)
</span>V=πr^2<span>h (cylinder)
r=7
h=14

</span>V≈2155.13 <span>units cube (cylinder) </span>

5 0
3 years ago
Read 2 more answers
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