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Nady [450]
3 years ago
11

5x+4=19 i need help agian

Mathematics
2 answers:
vladimir2022 [97]3 years ago
6 0

Answer:

x = 3  

Step-by-step explanation:

5x + 4 = 19

5x +4 -4 = 19 -4

5x = 15

5x / 5  = 15 / 5

x = 3  

KengaRu [80]3 years ago
5 0

Answer:

x-3

Step-by-step explanation:

5x= 19-4

5x= 15

x= 15/5

x= 3

You might be interested in
Which of the following is true for the relation f(x) = x2 + 8?
lilavasa [31]

Answer:

Only the equation is a function

Step-by-step explanation:

we have

f(x)=x^{2} +8

Find out the inverse of f(x)

Let

y=f(x)

y=x^{2} +8

Exchange the variables (x for y and y for x)

x=y^{2} +8

Isolate the variable y

y^{2}=x-8

square root both sides

y=(+/-)\sqrt{x-8}

Let

f^{-1}(x)=y

f^{-1}(x)=(+/-)\sqrt{x-8}

The inverse function is not a function (because for one input value the function has two different output values)

therefore

Only the equation is a function

4 0
3 years ago
At a bake shop, the cost of flour is $2.50 per pound and increases at a rate of $0.07 per month. The cost of cocoa is $6.00 per
Vesna [10]

Answer:

Step-by-step explanation:

We will find two equations for this system, one representing flour and the other representing cocoa.  For the flour, we start with $2.50, and the cost goes up .07 per month, x. The equation for that is

y = .07x + 2.50

For the cocoa, the equation is written in the exact same way, but the cost goes down.  Down is a negative thing while up is a positive thing.  The cost starts at $6.00 and goes down .03 per month, x. The equation for that is

y = -.03x + 6.00

Comparing the first equation to the second, the .07 is positive because the cost goes UP that amount per month and the .03 is negative because the cost goes DOWN that amount per month.  Get it?

If y is cost and we are tryong to find out where the cost is the same, we are looking for when y is the same.  If the first y is equal to .07x + 2.50 and the second y is equal to -.03x + 6.00, and y is equal to y, then

.07x + 2.50 = -.03x + 6.00 (this is setting the first y equal to the second y).  This is the system that describes how to find the number of months x when the cost y is the same. We'll solve it just for practice.

Combining like terms we get

.10x = 3.5 so

x = 35

Now back sub in what x equals to solve for y.  If x = 35, then in the first equation,

.07(35) + 2.50 = y and

y = 4.95 (you could have used the second equation and subbed in 35 for x and you will get the exact same y value.  Promise!)

What this answer tells us is that 35 months after the start of this pricing, the cost of flour will be the same as the cost of cocoa.  But immediately after 35 months, the costs will not be the same anymore.  It is only AT 35 months.  At 36 months, the costs will be different.

7 0
2 years ago
Help me please I need it
KatRina [158]
The domain is the furthest point on the x axis so you would have. [-6,infinity) and range is the lowest point on the y axis so. [-2,infinity)

hope that helps
4 0
3 years ago
WILL GIVE BRAINLIEST <br> solve for x<br><br> A. 70/6<br> B. 60/16<br> C. 6<br> D. 11
miss Akunina [59]
So a line is 180°
Since it gave you options, the easiest way would be to plug it in (plug and chug)
the answer is 11
first what I did was plug 12 into 5x+10 and then found the answer and then added 58°
the answer of that subtracted from 180
with that I then plugged in 11 for x for 11x+2 = 123
180 - 123 = 57 which is the same answer for the missing angle within the triangle


3 0
2 years ago
Four more than five times a number is -16. What's the number
ollegr [7]

Answer: 4

Step-by-step explanation:

5 0
3 years ago
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