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weeeeeb [17]
3 years ago
6

Help with pre algerbra equations PLZ

Mathematics
2 answers:
Makovka662 [10]3 years ago
8 0
5.4a+8.2=9.8a-2.8  subtract 9.8a from both sides

-4.4a+8.2=-2.8  subtract 8.2 from both sides

-4.4a=-11  divide both sides by 4.4

a=11/4.4

a=2.5
...

6(m-2)=12  perform indicated operations on left side...

6m-12=12  add 12 to both sides

6m=24 divide both sides by 6

m=4

...

6-m=5m+30  subtract 5m from both sides

6-6m=30  subtract 6 from both sides

-6m=24  divide both sides by -6

m=-4
Fudgin [204]3 years ago
3 0
For the first one a = 2.5. For the second one m = 4. For the third one m = -4
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aliina [53]
C
explanation:
6(1)-39=-33
6(2)-39=-27
8 0
3 years ago
The vertices of a triangle are located on a coordinate grid as follows: A (2,2) ,B (2,-6) , and C (-5,-6) . What is the area of
inn [45]
The answer for this question will be c. 28 square units.
3 0
3 years ago
The function y = x 2 - 10x + 31 has a ____
katrin [286]

Answer:

Option B. minimum is correct for the first blank

Option C. 6 is correct for second blank.

Step-by-step explanation:

In order to find the maxima or minima of a function, we have to take the first derivative and then put it equal to zero to find the critical values.

Given function is:

f(x) = x^2-10x+31

Taking first derivative

f'(x) = 2x-10

Now the first derivative has to be put equal to zero to find the critical value

2x-10 = 0\\2x = 10\\x = \frac{10}{2} = 5

The function has only one critical value which is 5.

Taking 2nd derivative

f''(x) =2

f''(5) = 2

As the value of 2nd derivative is positive for the critical value 5, this means that the function has a minimum value at x = 5

The value can be found out by putting x=5 in the function

f(5) = (5)^2-10(5)+31\\=25-50+31\\=6

Hence,

<u>The function y = x 2 - 10x + 31 has a minimum  value of 6</u>

Hence,

Option B. minimum is correct for the first blank

Option C. 6 is correct for second blank.

8 0
3 years ago
Find the arc length of a 30 degree sector of a circle with a radius of 10 cm
Elena-2011 [213]
Arc length = Ф/360 * 2πr
= 30/360 * 2*3.14*10
= 1/12 * 62.8
= 5.23

In short, Your Answer would be 5.23 cm

Hope this helps!
3 0
3 years ago
Please need help asap!!
IrinaK [193]
The trapezoid,segment is false
4 0
3 years ago
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