1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gwar [14]
3 years ago
5

How to do this ? Don’t understand it

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
7 0
X=y+3
<span>-5x-4y=<span>30
-------------------
Substitute y + 3 for x in </span></span>-5x-4y=30
<span><span>-5<span>(y+3)-</span></span>4y</span>=<span>30
</span>-9y-15=<span>30
</span>----------------------------
Add 15 to each side
<span><span>-9y-15</span>+15</span>=<span>30+<span>15
-9y = 45
</span></span>-----------------------------------
Divide each side by -9
-9y ÷ -9 = 45 ÷ -9
y = -5
Now we solve for x
====================================================================
Substitute -5 for y in x = y + 3
x=-<span><span>5</span>+<span>3
</span></span>x = -2
----------------------
(-2,-5) is your answer


You might be interested in
How do you do this i am lost
Jet001 [13]

Answer:

The solution is (-2, 4)

Step-by-step explanation:

When finding the solution of system of equations, you need to find where both lines intersect.

In the graph shown, the light purple and dark purple line meet at (-2, 4).

Hope this helps!!

8 0
3 years ago
Janet has 120 dollars,. if she saves 20 dollars per week, in how many days will she have 500?
GrogVix [38]
After 28 days she will have 200. every 28 days she saves 80 dollars and after 112 she will have saved 320. She will then be at 460 and need 40 more dollars which is 14 days, and 112 plus 14 is 126 days. Hope that helped
4 0
3 years ago
what is the total weight of the italian Sandwhich?write the amount as a fraction in simplest form,meat:0.35,vegie:0.15,sauce:0.0
Olegator [25]
The total weight of the Italian sandwich in its simplest fraction is 3/5.

meat      : 0.35  in fraction 35/100
veggies : 0.15 in fraction 15/100
sauce    : 0.05 in fraction 5/100
bread     : 0.05 in fraction 5/100

Total weight = 35/100 + 15/100 + 5/100 + 5/100
                    = (35 + 15 + 5 + 5) / 100
                    = 60/100

To simplify the fraction:

60/100 ⇒ 60 ÷ 10 = 6 ; 100 ÷ 10 = 10 ⇒ 6/10
6/10 ⇒ 6 ÷ 2 = 3 ; 10 ÷ 2 = 5 ⇒ 3/5

7 0
3 years ago
Read 2 more answers
Ms.Cornick bought 6 new pens for $5.70. How much would it cost her to buy 11 pens at the same rate?​
UNO [17]

Answer:

about 11.50

Step-by-step explanation:

6 / 5.70 = 1.05

1.05 x 11

hope this helps

5 0
3 years ago
True or False: You can be considered a living thing even without a DNA based genetic code,
Illusion [34]

Answer:

True

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • )Simplify the following expression: (−1)(−7)(4)
    9·1 answer
  • Find the value of x
    13·1 answer
  • There are 125 students in sixth grade. 2/3 of the sixth graders ride the bus. How many sixth graders ride the bus?​
    9·1 answer
  • (<br> -<br> 4b^3–7b^2+5b–2)+(<br> -<br> 6b^3+3b^2+8b–6)
    6·1 answer
  • X+8 &gt; 18 how do you solve it
    7·1 answer
  • Which of the following expressions could be used to find the perimeter of this figure?
    15·2 answers
  • Makayla has a loyalty card good for a discount at her local hardware store. The item she wants to buy is priced at $37, before d
    5·2 answers
  • The cost C in dollars of manufacturing x bicycles at Holladay's Production Plant is given by the function.
    13·1 answer
  • Pls help i’m so confused!!
    14·1 answer
  • Need help quick! Will give brainliest to first right answer.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!