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
Norma-Jean [14]
2 years ago
13

What is 2x-15+21= -18​

Mathematics
2 answers:
Brrunno [24]2 years ago
7 0
Hopes this helps:

Answer: x = -12

How I know I use this app called Cymath.
kirill115 [55]2 years ago
4 0

Answer:

2x - 15 +21 = -18

2x + 6 + 18 = 0

2x + 24 =0 ...it is a linear equation

if u want to solve for X then..

2x = -24

X = <u>-</u><u> </u><u>24</u>

2

X = -12

You might be interested in
For each of the following shapes, state whether or not it has reflection symmetry. If it does , draw the lines of symmetry it.
Effectus [21]
You would have to draw a line across
5 0
1 year ago
Earth is approximately 5x109 years old. For which of these ages could this be an approximation? Select all that apply.
Mariana [72]

Answer:

The answer is around 50,000,000,000 years so its E

Step-by-step explanation:

5 0
2 years ago
Show 2 different solutions to the task.
laila [671]

Answer with Step-by-step explanation:

1. We are given that an expression n^2+n

We have to prove that this expression is always is even for every integer.

There are two cases

1.n is odd integer

2.n is even integer

1.n is an odd positive integer

n square is also odd integer and n is odd .The sum of two odd integers is always even.

When is negative odd integer then n square is positive odd integer and n is negative odd integer.We know that difference of two odd integers is always even integer.Therefore, given expression is always even .

2.When n is even positive integer

Then n square is always positive even integer and n is positive integer .The sum of two even integers is always even.Hence, given expression is always even when n is even positive integer.

When n is negative even integer

n square is always positive even integer and n is even negative integer .The difference of two even integers is always even integer.

Hence, the given expression is always even for every integer.

2.By mathematical induction

Suppose n=1 then n= substituting in the given expression

1+1=2 =Even integer

Hence, it is true for n=1

Suppose it is true for n=k

then k^2+k is even integer

We shall prove that it is true for n=k+1

(k+1)^1+k+1

=k^1+2k+1+k+1

=k^2+k+2k+2

=Even +2(k+1)[/tex] because k^2+k is even

=Sum is even because sum even numbers is also even

Hence, the given expression is always even for every integer n.

3 0
3 years ago
Find the area of the parallelogram
iogann1982 [59]

Answer:

The answer is 32.

Step-by-step explanation:

Just multiply the height by the base length. 4*8=32

8 0
2 years ago
Please help, will mark you as brainleist!!!
svet-max [94.6K]

Answer:

(1.) 50 (2). 112.5

Step-by-step explanation:

multiply the both sides and then divide ( for each one)

8 0
2 years ago
Other questions:
  • Julia has 19 apples she want 15 more that 19 But less then 16
    9·1 answer
  • Which expression is equal to 4 x 3 x 5?
    11·2 answers
  • Y=3x+8 Y=-2x-2<br>can anyone help me with this ??
    9·2 answers
  • What's the solution to 3x – 6 &lt; 3x + 13? A. x &gt; 5 B. There are no solutions. C. There are infinitely many solutions. D. x
    8·1 answer
  • I don't know how to do this or what i'm doing plz help
    15·1 answer
  • Write the expression in its simplest form : -3 (7h+1)+6h
    13·2 answers
  • Determine the vertex form of g(x) = x2 + 2x – 1. Which graph represents g(x)? On a coordinate plane, a parabola opens up. It goe
    10·2 answers
  • Leonard made some muffins. He gave 5/8 of them to his grandmother and 10 muffins to his aunt. He then had 11 muffins left. How m
    14·2 answers
  • To divide 572/4 Stanley estimated to place the first digit of the quotient. In which place is the first digit of the quotient?
    5·1 answer
  • Need help with 17 pre college
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!