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
notsponge [240]
3 years ago
11

Need some help with this question!

Mathematics
1 answer:
Veronika [31]3 years ago
6 0
1. solve for x in first to just find nterms of y

x=12-y
sub that for x in other one
first divide that one by 2 to make it easier
2x-y=18
2(12-y)-y=18
24-2y-y=18
24-3y=18
minus 24 both sides
-3y=-6
divide -3
y=2

D is answer




2.
find intersection of x+y=5 and -2x+3y=6
or easiers, just test the intersections
wait, they all intersect in the same place
this is super easy
pick ANY point that is in that reigon and see if it is true

A, if we pick lets say (5,5)
that is false for x+y<5
not A

B
pick (10,0)
false for first one
not B

C
pick (0,0)
true for first
false for 2nd
not C


D. pick (-10,0)
true for first
true for 2nd


answer is D


answer is D for both questions
You might be interested in
Help 9-11 thank you !
krok68 [10]

Answer:

9 - 11 = -2

Step-by-step explanation:

Because 9 is being subtracted by a number greater than itself, the answer has to be a negative and because:

9 + 2 = 11

9 - 11 = (-2)

Your Welcome :)

7 0
2 years ago
​Solve the absolute value equation. Check for extraneous solutions: |9x-3|=12
STatiana [176]

ANSWER: x=5/3, -1. Good luck. Hope this suffices.

Explanation for x=-1: |9x-3|=12. Lets take the absolute value brackets away for a sec. Add 3 to both sides 9x-3+3=-12+3, simplify: 9x=-9, divide both sides by nine:9x/9=-9/9. And that means that x=-1.

Explanation for x=5/3: |9x-3|=12. Add 3. 9x-3+3=12+3. Simplify: 9x=15. Divide both sides by 9. 9x/9=15/9. Simplify: x=5/3

5 0
2 years ago
Find the exact value of the indicated trigonometric functions for the acute angle a:
amid [387]

Tan=24/10 ≈ 2.4

using Pythagoras theorem

x²=(24)²+(10)²

x²=576+100

x²=57600

x=√57600 => 240

Therefore

sina=24/240 => 0.1

cota=1/tana => 1/(24/10) => 10/24

7 0
2 years ago
Y varies directly as x. If x = 15 when y = 20, find x when y = 30.
Goryan [66]

Answer:

22.5

Step-by-step explanation:

y=kx

20=k15

k=1•33

30=1•33x

x=22•5

5 0
3 years ago
-10.2+c=-8.14<br> Helpppp
Oksanka [162]

Answer:

c=18.34

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Given the data set for the height and shoe size of every student in a math class, hypothesize a relationship between the variabl
    15·1 answer
  • Birr 6500 were divided equally among a certain number of persons.Had there been 15 more persons,each would have got Birr 30 less
    12·1 answer
  • Is 0.0009763 a positive or a negative
    15·2 answers
  • Which of the following is the solution to (x)+19&lt;3
    11·2 answers
  • Si yo tengo una canasta llena de mangos y piñas, de las cuales hay 30
    11·1 answer
  • If Ac=48, determine Ab
    8·1 answer
  • Please help me? :\ :/
    8·1 answer
  • PLEASE HELP I WILL MARK YOU BRAINLIEST IF CORRECT
    13·2 answers
  • Ples help! T^T<br> Which expression is equivalent to 1/5 (150x-80y+50-50x-25y+20)
    14·2 answers
  • Find the volume of the cone shown as a decimal rounded to the nearest tenth. 22m 12m
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!