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
balandron [24]
2 years ago
12

What is the answer to -2a-9=6a+15

Mathematics
2 answers:
statuscvo [17]2 years ago
6 0

Answer:

a=-3

Step-by-step explanation:

-2a-9=6a+15

+2a +2a

-9=8a+15

-15 -15

-24=8a

8 8

-3=a

timurjin [86]2 years ago
4 0

Answer:

a=-3

Step-by-step explanation:

-2a-9=6a+15

Add 9 to both sides:

-2a-9+9=6a+15+9

-2a=6a+24

Subtract 6a from both sides:

-2a-6a=6a+24-6a

-8a=24

Divide both sides by -8:

\frac{-8a}{-8}=\frac{24}{-8}

a=-3

You might be interested in
What is the range of the function<br> f(x) = = 3x + 2 in the domain -2
djyliett [7]

Answer:

The range is:

{-4, 1, 2, 5, 8}

Step-by-step explanation:

Given the function

f(x)=3x+2

  • We know that the domain of a function is the set of input or argument values for which the function is real and defined.

As the domain interval -2 ≤ x ≤ 2

i.e. the values in the domain = {-2, -1, 0, 1, 2}

  • We also know that the range of a function is the set of values of the dependent variable for which a function is defined.

As the domain interval -2 ≤ x ≤ 2

Putting all the x-values in the domain interval in the function

so

putting x=-2 in the function

f(x)=3x+2

f(-2)=3(-2)+2=-6+2=-4

putting x=-1 in the function

f(x)=3x+2

f(-1)=3(-1)+2=-3+2=1

putting x=0 in the function

f(x)=3x+2

f(0)=3(0)+2=0+2=2

putting x=1 in the function

f(x)=3x+2

f(1)=3(1)+2=3+2=5

putting x=2 in the function

f(x)=3x+2

f(2)=3(2)+2=6+2=8

Thus, when we put the domain values, the corresponding range values are:

x           y

-2         -4

-1           1

0           2

1             5

2            8

Therefore, the range is:

{-4, 1, 2, 5, 8}

8 0
2 years ago
What sum of money amounts to rupees 8700 in 3 years at the rate of 24 % per annum​
Zina [86]

Given:

Amount = 8700

Time = 3 years

Rate of interest = 24% per annum

To find:

The principal values.

Solution:

Formula for amount:

A=P\left(1+\dfrac{r}{100}\right)^t

Where, A is amount, P is principal, r is the rate of interest and t is the number of years.

Putting A=8700,r=24,t=3, we get

8700=P\left(1+\dfrac{24}{100}\right)^{3}

8700=P\left(1+0.24\right)^{3}

8700=P\left(1.24\right)^{3}

8700=1.906624P

Divide both sides by 1.906624.

\dfrac{8700}{1.906624}=P

4563.0391729=P

P\approx 4563.04

Therefore, the principal value is about 4563.04.

8 0
2 years ago
A square pyramid has a volume of 20 cubic feet and a base length of 5 feet. What is it's height?
erastova [34]

Answer:

The height of the pyramid is 2.4\ ft

Step-by-step explanation:

we know that

The volume of a square pyramid is equal to

V=\frac{1}{3}b^{2}h

we have

V=20\ ft^{3}

b=5\ ft

substitute and solve for h

20=\frac{1}{3}(5)^{2}h

60=(25)h

h=60/(25)=2.4\ ft

5 0
3 years ago
Please answer with work explanation (if possible)
andrey2020 [161]

Answer:

$357.42

Step-by-step explanation:

So first I multiplied $425.50 by 20%.

$425.50 * 0.20=  85.10

$425.50- 85.10= $340.40

$340.40 * 0.05 = $17.02

$340.40 * 0.07 = $23.828

$340.40 + 23.828 + 17.02= $ 357.42

The sale price of Dean's guitar is $357.42.

4 0
2 years ago
Which value of x makes the equation 1.25(4x+2)=32.5
UkoKoshka [18]

Answer: x=6

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • Let a , a , be an arbitrary infinite sequence of events, and let b , b , be 12 12 another infinite sequence of events defined as
    13·1 answer
  • the floor in the back of karl's trunk is 6 ft long and has area of 24 ft^2. Karl wants to haul as many boxes on the floor as pos
    9·2 answers
  • Assume that adults have IQ scores that are normally distributed with a mean of 95.9 and a standard deviation of 16.4. Find the f
    14·1 answer
  • The golfer hit the ball 6000 yards. How many feet is this?
    5·2 answers
  • What is the consumer's ability and desire to buy goods and services called? A. supply B. demand C. equilibrium
    11·2 answers
  • A number c decreased by 9 is less than or equal to 20. Find c?
    10·1 answer
  • 2 figures are blank if one can be obtained from the other by a series of rotations, reflections, or trnaslations
    10·1 answer
  • Please help me- thank you
    15·1 answer
  • I really need help also if you could expalin it that would help alot!<br> ABC=DBC, AB=10 AC=7 DC=?
    15·2 answers
  • Find the area and explain how you did it for 15 points and brainest.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!