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
Kay [80]
3 years ago
8

I need help with the work of the math

Mathematics
1 answer:
8_murik_8 [283]3 years ago
7 0

Answer:

13) (-2,-3)  14) (7,-4)   15) (-8,7)

Step-by-step explanation:

13) y=8x+13

   -4x-5y=23

use substitution

-4x-5(8x+13)=23

distribute -5 in the parenthesis

-4x-40x-65=23

-44x-65=23

add 65 on both sides

-44x=88

divide both sides by -44

x=-2

for y...

y=8(-2)+13

y=-16+13

y=-3

answer is (-2,-3)

14) -3x-y=-17

y=-4x+24

use substitution

-3x-1(-4x+24)=-17

distribute the -2 in the parenthesis

-3x+4x-24=-17

x-24=-17

add 24 on both sides

x=7

for y...

y=-4(7)+24

y=-28+24

y=-4

answer is (7,-4)

15)5x+4y=-12

   y=-2x-9

use substitution

5x+4(-2x-9)=-12

distribute 4 in the parenthesis

5x-8x-36=-12

-3x-36=-12

add 36 on both sides

-3x=24

divide both sides by -3

x=-8

for y...

y=-2(-8)-9

y=16-9

y=7

answer is (-8,7)

You might be interested in
To rent a certain meeting room, a college charges a reservation fee of $19 and an additional fee of $4 per hour. The chemistry c
Gre4nikov [31]

Answer:

The possible number of hours the chemistry club can rent the meeting room is 7 hours.

Step-by-step explanation:

h=hours

19+4h=47

Subtract 19 from both sides of the equation.

4h=28

Divide 4 from both sides of the equation.

h=7

The possible number of hours the chemistry club can rent the meeting room is 7 hours.

Hope this helps :)

4 0
3 years ago
Read 2 more answers
Simplify ½of(3/5-1/4)​
liq [111]

Answer:

\frac{7}{40}

6 0
3 years ago
Read 2 more answers
12. Car insurance that pays for your injuries when you're in an accident in your car is
AURORKA [14]
C. Medical expenses

When you find yourself in an accident your MEDICAL expenses are paid by the car insurance.
7 0
3 years ago
What is 3/4-5/8?<br> ? Give your answer in its simplest form.
Setler79 [48]

Answer:

1 over 8

1

8

=0.125

Step-by-step explanation:

8 0
3 years ago
What is the Value of f(6) if f(x)=2x-11
il63 [147K]
The answers are
f
o
g
(
x
)
=
−
2
x
+
23
and
g
o
f
(
x
)
=
−
2
x
+
5

Explanation:
f
(
x
)
=
−
2
x
+
11

g
(
x
)
=
x
−
6

f
o
g
(
x
)
=
f
(
g
(
x
)
)
=
f
(
x
−
6
)
=
−
2
(
x
−
6
)
+
11

=
−
2
x
+
12
+
11
=
−
2
x
+
23

g
o
f
(
x
)
=
g
(
f
(
x
)
)
=
g
(
−
2
x
+
11
)
=
−
2
x
+
11
−
6

=
−
2
x
+
5

I think that the equations speak by themselves.
Of course,
f
o
g
(
x
)
≠
g
o
f
(
x
)
3 0
3 years ago
Read 2 more answers
Other questions:
  • A patient takes a medication with a half life. Initially, there are 11 milligrams of the medication in the patient's system. Aft
    13·1 answer
  • Evaluate <br> (86)(8-3)(4-2)<br> 2<br> .<br><br> A) 8 <br> B) 16 <br> C) 32 <br> D) 64
    13·1 answer
  • (5,2),y=2x-3 write and equation of the line that passes through the given point and is (a)parallel to and (b) perpendicular to t
    11·1 answer
  • Sophia is buying party favors.she has a budget of $2.75 a person for 6 people.how much can Sophia send on the party favors?
    5·1 answer
  • Round 624.914 to the nearest hundredth.
    5·1 answer
  • Triangle ABC has the coordinates A(-3, -2), B(2, 4) and C(2,-2). What is the area of triangle ABC?
    6·1 answer
  • Find the area of the right triangle.
    6·1 answer
  • Can you help me pls ?
    7·2 answers
  • Please help
    5·2 answers
  • HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!