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ella [17]
2 years ago
8

20.) which of the following expressions is equivalent to -6 (2x + 5)

Mathematics
1 answer:
Volgvan2 years ago
4 0

Answer:

-12X-30

Step-by-step explanation:

No expressions were given, so it could be a different expression, but if you multiply out -6 to 2X and +5 then you end up with -12X-30 which is equivalent to -6(2X+5)

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Help please this question is so hard!
Nitella [24]
So to solve this first you need to convert all the answers to decimals.
Site B 17/9 = 1.89 when you round up
Site D 4/3 = .75
Then look at all the numbers least to greatest.
D .75 m C 1.36 m A 1.60 m B 1.89 m
Answer D, C, A, B
6 0
3 years ago
Solve the equation. Check for extraneous solutions<br><br> please help!!!
lozanna [386]
!z!=a→z=a or z=-a; z=4x+3, a=9+2x

!4x+3!=9+2x
1) 4x+3=9+2x
Solving for x:
4x+3-3-2x=9+2x-3-2x
2x=6
2x/2=6/2
x=3

Checking for extraneous solution:
!4x+3!=9+2x
x=3→!4(3)+3!=9+2(3)
!12+3!=9+6
!15!=15
15=15 Ok, then x=3 is not a extraneous solution 

2) 4x+3=-(9+2x)
Solving for x:
4x+3=-9-2x
4x+3-3+2x=-9-2x-3+2x
6x=-12
6x/6=-12/6
x=-2

Checking for extraneous solution:
!4x+3!=9+2x
x=-2→!4(-2)+3!=9+2(-2)
!-8+3!=9-4
!-5!=5
5=5 Ok, then x=-2 is not a extraneous solution

Answer:
x = -2 or 3 
4 0
3 years ago
Insert 5 G.Ms between 3 and 192​
never [62]

Answer:

6, 12, 24, 48 and 96.

Step-by-step explanation:

We look for a geometric sequence with first term = 3:

nth term= a1 r^(n-1)

3 r^(n-1) = 192

r^(n-1) = 192 / 3 = 64

2 ^ 6 = 64   so r = 2.

Series is 3 ,6, 12, 24, 48, 96, 192.

So 5 geometric means would be 6, 12, 24, 48 and 96.

7 0
3 years ago
Your middle school has 900 students. 1/3 of students bring their lunch instead of buying lunch at school. What is the value of t
Sholpan [36]
Hey there! 
This may seem pretty scary because, duh, fractions, big numbers, MATH.
However, you've just got to break it down.
So first, we find out how many students BRING lunch.
To find 1/3 of 900, you just multiply 900 by 1/3. \frac{900}{1} *  \frac{1}{3} 
BUT WE CAN SIMPLIFY: to 300/1 times 1/1, which is 300/1.
So 300 people BRING lunch.
Now, to find people who BUY lunch, you just subtract the number of people who bring lunch by the total number of people.
900
-300
600 
So 600 people BUY lunch.
All that's left to do is turn all these numbers into a ratio.
Easy peasy: put 300 and 600 like a fraction, like so:
\frac{300}{600}
Hope this helped! ;)


6 0
3 years ago
kiley spent $20on ride and snacks at the state fair.If x is the amount she spent on rides, and y is ther amount she spent on sna
Evgesh-ka [11]

It is linear because it is a straight line when graphed. It is not proportional because there is not always a constant ratio between them.

6 0
3 years ago
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