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BartSMP [9]
2 years ago
12

X = 2y-2 4x-9 = 11 Step by step please

Mathematics
1 answer:
Alex787 [66]2 years ago
4 0
Answer x=5, y= 3.5

Find y by plugging the x value into the 2nd equation
4(2y-2) -9=11
8y - 8 - 9 =11 combine like terms
8y = 28 divide both sides by 8
y = 3.5

Now find x
Plug your y value into first equation
X = 2(3.5) -2
X= 7-2
X=5

You can check your work by putting your x or y values into the equations

For the first equation
5=2(3.5) -2
5=5

For the second equation
4(5) -9 = 11
20 - 9 = 11
11 =11

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the sum of a whole number A and a whole number B is 16, and the ratio A: B is equivalent to 5: 3. Find A and B.
Cerrena [4.2K]

Answer: A is 10; B is 6

Step-by-step explanation:

Let the sum of a whole number A and a whole number B = 16

A + B = 16

The ratio A: B = 5: 3

Possible whole numbers whose ratio gives 5 : 3 are 10 and 6, 15 and 9, 20 and 12 etc. However, since A + B must equal 16, only 10 and 6 fulfil the condition

So, let A be 10, while B is 6

10 + 6 = 16

The ratio 10 : 6 = 10/6 = 5/3

Thus, the value of A is 10; while B is 6

4 0
4 years ago
Lauren is the touring students at the library on Saturday if she is a library for a total of 6 hours and she helps each student
wariber [46]
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8 0
4 years ago
The side of a triangle have length x, x+4, and 20. If the length of the longest side is 20, which value of x would make the tria
Sphinxa [80]

Answer:

12∠x∠16

Step-by-step explanation:

For the triangle to be acute,a²+b²+c²,

Where c is the largest side of the triangle.  

Hence, we must say x²+(x+4)²≥20²,  

or after simplifying, x²+4x-192≥0 or (x+16)(x-12)≥0

Since x must have positive values only, x≥12

Therefore, for the triangle to be acute,we must have 12≤x≤16.  

6 0
3 years ago
What is the perimeter of the polygon?
AnnyKZ [126]
Perimeter is where you add up all the sides, which is 5+5+4+6+7+9=36cm
5 0
3 years ago
I’ll give you 30 points if you help
KATRIN_1 [288]

Answer:

2, -2

Step-by-step explanation:

f(x) = 2x + 1

g(x) = x - 3

To find g(f(x)), you need to put f(x) into g(x).

g(f(x)) = (2x + 1) - 3

g(f(x)) = 2x + 1 - 3

g(f(x)) = 2x - 2

Your answer will be 2 and -2.

5 0
3 years ago
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