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
melisa1 [442]
3 years ago
13

Evaluate the expression -3+2× if the value of x = -2 i got answer -7

Mathematics
2 answers:
seraphim [82]3 years ago
4 0

Answer:

-7

Yep you were right!

Step-by-step explanation:

-3+2(-2)

-3+-4

-7

nikitadnepr [17]3 years ago
4 0

Answer:

-7

Step-by-step explanation:

The value of -3 + 2x at x = -2 is -3 + 2(-2) = -3 - 4 = -7.  You are correct.

You might be interested in
Invasive species often experience exponential population growth when introduced into a new environment. Zebra mussels are an inv
Oliga [24]

Answer:

If ‘a’ is the initial population of the Zebra mussels, then every six months, the population of Zebra mussels quadruples, i.e. it becomes 4a. In t years, i.e. in 2t intervals of 6 months each, the population of Zebra mussels can be computed with the help of a geometric series a, ar, ar2, ar3, …. arn-1 ( the series being finite with n terms) where a is the 1st term , r is the common ratio and n is the number of terms in the series..

Here, in 2t years, there will be 2t + 1 terms in the geometric series including the initial term. Thus in the above series, a = 10, r = 4 and n = 2t + 1. Then the population of the Zebra mussels after 2t years is the (2t +1)st term of the geometric series I.e. 10* ( 42t)                  

In 15 months, t = 15/12 = 1.25. Then the population of Zebra mussels after 15 months will be 10*(42.5 ) = 10 * 25 = 320

If after t years, the population of the Zebra mussels become 1 million , then we have

1000000 = 10 * (42t) or, 100000= 42t or,105 = 42t    Taking logarithms of both sides, we have 5 log 10 = 2t log 4 or, t = (5log10)/(2log4) = 5/1.20 years or (5/1.20) * 12 months = 50 months, i.e. 4 years and 2 months.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Haroldo, Xerxes, Regina, Shaindel, Murray, Norah, Stav, Zeke, and Georgia are
anastassius [24]

And this problem, we're trying to figure out the probability that Xerxes arrives first and Regina arrives last. Now, the first thing to note is that there are nine people. So if we list off nine different spaces, there's nine spaces and now the order in which they arrive could be any order. So for the first spot there are nine different ways that someone can show up, Anyone can show up first and then once someone has shown up first, the person who arrives second, there are eight different ways to choose that person. Similarly, the person who arrives third, there are seven people remaining, so there's seven ways to choose that and so on. And so there are actually nine factorial ways that the people can arrive to the party. Now if xerxes needs to be in the first spot and Regina needs to be in the last spot than in these remaining seven spaces, we can put any people, so there can be any ordering between xerxes and Regina. So there is seven factorial ways to order the people between xerxes and Regina. So the probability that we end up with is seven factorial divided by nine factorial. So that is seven factorial. And remember that nine factorial can be written as nine times eight times seven factorial. The seven factorial are going to cancel. We get 1/7 times eight which is equal 1/72 which is equal to approximately zero point 014 and that's it

3 0
2 years ago
D<br> 9<br> CD = [?]<br> A 3 B 3 C<br> Enter the number that belongs in<br> the green box.<br> Enter
White raven [17]

Answer:

hi

Step-by-step explanation:

i think it is probably 9

hope it helps

5 0
3 years ago
The equation 10x + 5y = 150​
Verdich [7]

Answer:

x = 14.5      y = 1

Step-by-step explanation:

get the x alone by subtracting 5y from both sides

10x + 5y = 150

      - 5y    -5y

10x = -5y + 150

divide both sides by 10

<u>10x</u> = <u>-5y + 150</u>

10            10

x = -0.5y + 15

Now that we've solved for x, we can plug it into the original equation

10 (-0.5y + 15) + 5y = 150

now we solve for y the same way we did x

first distribute 10 into (-0.5y + 15)

-5 + 150 +5y = 150

now we get the y alone

-5 + 150 + 5y = 150

+5  -150            -150 +5

5y = 5

now divide by 5

<u>5y</u> = <u>5</u>

5     5

y = 1

now that we have both x and y, we plug y into our solution for x

x = -0.5y + 15

x = -0.5(1) + 15

x= -0.5 + 15

x = 14.5

4 0
3 years ago
How can I write 625 in as many ways as I can in exponents
kirill [66]

Well,  625  is  5 x 5 x 5 x 5 .

So that would be:

(5)⁴

5 x (5)³

(5)² x (5)²

And you could even go the other way if you want to get silly:

(5)⁵ x (5)⁻¹

(5)⁶ x (5)⁻²
.
.
etc.

4 0
3 years ago
Other questions:
  • miss. Nikkel want to divide her class of 23 students into 4 equal teams.is this reasonable?why or why not
    7·2 answers
  • If the equation is p=2.5v-500 would the graph be going up or down?
    14·2 answers
  • How many packages does Carlos need to buy to get 18 erasers?
    11·1 answer
  • How to solve 4|x+6|greater than or equal to 20
    6·1 answer
  • Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eight minutes. When completing t
    14·1 answer
  • Please help, my brain just sucks rn. The area of a rectangle is 93.6 square inches. If the length of one of its sides is 5.2 in.
    9·1 answer
  • Select the statement that describes the expression 7+2n
    15·2 answers
  • How do you break apart the factor 42 using place values
    6·1 answer
  • Last year, 120 students were sick at school. This year, 20% fewer students are sick. How many students are sick this year?
    12·1 answer
  • I need help on question 9 I would appreciate it:0
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!