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densk [106]
2 years ago
9

If you know any of these could yoy hep me out :D

Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
5 0
7. X=5
8. X=6
9. B=-3
10. G=3.4
You might be interested in
-4x-15y=-17<br>-x+5y=-13<br><img src="https://tex.z-dn.net/?f=%20-%204x%20-%2015y%20%3D%20%20-%2017%20%20%5C%5C%20%20-%20x%20%2B
salantis [7]
To solve this system of linear equations we need a little trick called elimination steps are below

we are given the following system of equations
- 4x - 15y = - 17
- x + 5y = - 13
if you look at the x variables in both equations you can see that we can easily eliminate them by multiplying the bottom equation by -4 as so
- 4x - 15y = - 17
- 4( - x + 5y = - 13)
simplify and we get
- 4x - 15y = - 17
4x - 20y = 52
now we can combine like terms on each side with the x's cancelling and get

- 35y = 35
now divide off -35
y = - 1
great now we can go back to our original system and pick a equation and substitute y back in to find x lets use

- x + 5y = 13
so now we substitute y and get
- x + 5( - 1) = 13
- x - 5 = 13
- x = 17
x = - 17

now we put x and y into one coordinate (x,y)
so now our FINAL ANSWER IS
(-17,-1)
6 0
3 years ago
The doctor wrote a prescription for 3,110 milliliters of medicine. How many liters of medicine did she prescribe? (1 liter = 1,0
MrRa [10]

Answer:

3.11 liters

Step-by-step explanation:

converting mL to L requires dividing by 1000, or moving the decimal point 3 places to the left

8 0
2 years ago
Please Help me<br>with this problem!​
Margaret [11]

Answer:-2 -4 for point b

Step-by-step explanation:

6 0
2 years ago
An electrician charges 110 after 2 hours of work and 190 for 4 hours of work. Write a linear equation in point-slope form that r
Andrej [43]

Answer:

y = 40x + 30

Step-by-step explanation:

The equation for a linear function is given by:

y = mx + b;

where y and x are variables, m is the slope or rate of change of the function and b is the initial value of y at x = 0 (that is y intercept).

Let y represent the total cost and x represent the number of hours worked.

The electrician charges 110 after 2 hours of work and 190 for 4 hours of work.

Representing in coordinate form as (x, y) we get:

(2, 110) and (4, 190)

The equation of the function can be gotten using the formula:

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

Therefore:

y-110=\frac{190-110}{4-2}(x-2)\\\\y-110=40(x-2)\\\\y-110=40x-80\\\\y=40x-80+110\\\\y=40x+30

6 0
2 years ago
In the equation 3x/4=1/x , the value of b is
Vinvika [58]

Answer: x=1.154701,−1.154701

Step-by-step explanation: hope this helps but there is no b but i can help w/ the answer if ur looking for that

Plz give me brainliest! thxxx

6 0
3 years ago
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