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
The drawing of a model race car shows a length of 2 inches. The length of the actual model car is 16 inches.
erica [24]

Answer:

oc

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
PLEASEEE HELP ME is for my math test and i need this answer i would give 15 points but please help me
olganol [36]
It would be the last option; 4 sqroot 13 = 14.42 / 14 2/5 = 14.4
6 0
3 years ago
PLSSSS HELPPP MEEEEEE
labwork [276]
Circumference of the smaller circle, using C = \pi d, is approximately equal to 18.85 (I used the high floating point precision approximation of pi my calculator has in memory, then rounded to 2 decimal points.)

Using the formula S = 0.2L, which in English says "the smaller circle's circumference is equal to 20% of the larger circle's", we can substitute the known value S: 18.85 = 0.2L and solve for L: \frac{18.5}{0.2} = L, L = 92.5.

So the larger circle has a circumference approximately equal to 92.5 units.  

 
5 0
3 years ago
1. Simplify the expression. Assume that
ololo11 [35]

Answer:

b. 6|x|

Step-by-step explanation:

√(36x²) = √36√(x²)= 6|x|

Because √ from the number can be only positive.

5 0
3 years ago
which rate can you set 7 miles over 1 hour equal to in order to find the distance traveled in 49 hours at 7 miles per hour
IrinaVladis [17]

Answer:

Step-by-step explanation:

time = 49 hours

speed =  7 miles/hour

speed = distance / time

∴ distance = speed × time

= 7 × 49

= 343 miles

8 0
3 years ago
Other questions:
  • FINNA GO HAM ON THESE CHEECKS IF I DON'T GET THIS DONE.
    7·2 answers
  • A sociologist recently conducted a survey of citizens over 60 years of age who have net worths too high to qualify for Medicaid
    10·1 answer
  • 303 is what percent of 600?explain
    10·2 answers
  • The points (4, 1) and (x, -6) lie on the same line. If the slope of the line is 1, what is the value of x?
    15·2 answers
  • 18. Noah paid off a loan with a simple interest rate of
    7·1 answer
  • BRAINLIEST IF RIGHT PLUS 30 POINTS Drag the tiles to the boxes to form correct pairs. Match the pairs of equivalent expressions.
    11·1 answer
  • What is the surface area?
    12·1 answer
  • There are 42 more red marbles in a jar than there are white marbles. If there are 238 marbles in the jar, how many of them are r
    6·1 answer
  • PLEASE HELP ASAP!!!!!!!!
    11·1 answer
  • Help with geometry question please
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!