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Sergio [31]
3 years ago
9

Can somebody help me? here are the two questions, thanks in advance!

Mathematics
1 answer:
Elden [556K]3 years ago
6 0
Take one step at a time. First, let's evaluate g(1):

g(1) = 2*1-3 = -1

now plug this into f: 

f(-1) = 5*-1 = -5. So the second answer is the right one.
-----------------------
Same approach for q 12, only now we have no value to fill in for x. What's confusing here is that the x's of f and g should not be mixed up. For the sake of clarity let's rewrite f as

f(z) = 5z + 9.

Now we'll write 3-4x everywhere we find a z. Ah, only one place.

f(g(x)) = 5(3-4x) + 9 = 15 - 20x + 9 = 24 - 20x


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7 + X = 2x - 5<br> 7<br> Solve<br> 3
Anna11 [10]

Answer:

x=12

Step-by-step explanation:

7+x=2x-5

12=1x

x=12

8 0
3 years ago
Solve for x. SHOW YOUR WORK.
alukav5142 [94]

Answer:

1+1=2

Step-by-step explanation:

X is the answer to any math problem, and 1x2=2

3 0
2 years ago
All let work needs to be in tonight help me!!!!
LuckyWell [14K]
Why did you circle all of them ?
7 0
2 years ago
The longest side of a triangle is 3 in. longer than the shortest side. The medium side is 2 in. longer than the shortest side. I
Olenka [21]

s = length of the shortest side of the triangle

m = length of the medium side of the triangle

l = length of the longest side of the triangle

(you can use different variables like l, w, h, x, y.......)

Perimeter(P) of a triangle is the total sum of the sides, in this case:

P = s + m + l

You know:

P = 26in

l = s + 3     [longest side is 3in longer/more than(addition) the shortest side]

m = s + 2   [medium side is 2in longer than the shortest side]

To find the lengths of the three sides, you can do this:

P = s + m + l         Substitute/plug in what you know. So plug in 26 into "P" since P = 26, plug in (s + 3) into "l" since l = s + 3, and plug in (s + 2) into "m" since m = s + 2

26 = s + (s + 2) + (s + 3)     Combine like terms (like terms have the same variable and power/exponent)

26 = 3s + 5   To find "s", isolate/get the variable "s" by itself. Subtract 5 on both sides

21 = 3s      Divide 3 on both sides to get "s" by itself

7 = s        

Now that you found s, you can use it to find the other sides

m = s + 2          Substitute/plug in 7 into "s" since s = 7

m = 7 + 2

m = 9

l = s + 3    Plug in 7 into "s"

l = 7 + 3

l = 10

The longest side is 10 inches, the medium side is 9 inches, the shortest side is 7 inches

PROOF

P = s + m + l

P = 7 + 9 + 10

P = 26 inches

7 0
3 years ago
Read 2 more answers
What is the pattern of 1,4,3,6,5
nadezda [96]
The pattern would be +3 -1 
1+3=4
4-1=3
3+3=6
6-1=5
4 0
3 years ago
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