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
juin [17]
3 years ago
9

Solve each system of equations using substitution. a=5b+8 a=-10b-7​

Mathematics
1 answer:
lianna [129]3 years ago
7 0

Answer:

a = 3, b = -1

Step-by-step explanation:

a = 5b + 8

a = -10b - 7

5b + 8 = -10b - 7

Add 10b from both sides;

15b + 8 = -7

Subtract 8 from both sides;

15b = -15

Divide both sides by 15;

b = -1

Lets substitute b;

a = 5b + 8

a = 5(-1) + 8

a = -5 + 8

a = 3

You might be interested in
Mr.Mckay bought b boxes of crackers for $3 each and p pounds of cheese for $4 per pound.How much did he spend in all.
yulyashka [42]
3b + 4p= amount spent
8 0
3 years ago
Chanel is renting a digital video recorder from a cable supplier for a start up fee of $45 plus $5 per month. She has a budget o
Norma-Jean [14]
Fixed Cost = $45
Monthly Cost = $5

----------------------------------------
Define x:
----------------------------------------
Let x be the number of months she can rent.

----------------------------------------
Construct Inequality:
----------------------------------------
45 + 5x ≤ 250

----------------------------------------
Solve x :
----------------------------------------
45 + 5x ≤ 250
5x ≤ 250 - 45
5x ≤ 205
x≤ 41

--------------------------------------------------------------------------------
Answer: She can rent for a maximum of 41 months.
--------------------------------------------------------------------------------
5 0
4 years ago
2 + 3a + 9a
GrogVix [38]

wassup

terms: 2 ( 2 and 12a)

like terms : 3a and 9a

coefficients: 12

constants : 2

your welcome..

8 0
3 years ago
How do i write an inequality statement for 15°F and 5° F
natta225 [31]
15°F is hotter, or greater than, 5<span>°F.

15 > 5</span>
7 0
3 years ago
Read 2 more answers
1+(2/3)-(-9/2)<br> i don't understand this and i need help
kaheart [24]

Answer:

6.167

Step-by-step explanation:

1 + 2/3 - (-9/2)

1 + 2/3 + 9/2

Taking LCM (1 x 2 x 3)

6/6 + 4/6 + 27/6

6 + 4 + 27/6

37/6

6.167 Ans

6 0
2 years ago
Other questions:
  • The area of a rectangle, A = l • w is represented by the expression 24x6y15. Which could be the dimensions of the rectangle?
    14·1 answer
  • Use the distributive property to multiply <br><br> 4(-7x-9y-9)
    15·1 answer
  • Consider circle H with a 9 centimeter radius. If the length of minor arc RT is 3 2 π, what is the measure of ∠RST? A) 15° B) 25°
    9·2 answers
  • The cylinder has a height of 7 and a volume of 197.82. What is the radius?
    9·1 answer
  • HELPPPPPPPPPPP
    6·1 answer
  • Help with these questions please
    10·2 answers
  • X1 − x2 + x3 = 6
    12·1 answer
  • DONT IGNORE!!! I NEED HELP: NO LINKSS
    13·1 answer
  • Find the side lengths in the following triangle.
    5·1 answer
  • What is the volume of a sphere with a radius of 24 units?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!