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
Ket [755]
3 years ago
7

2a² - a - 13 =2 I want to see the steps how its done​

Mathematics
1 answer:
sammy [17]3 years ago
8 0

Answer:

Step-by-step explanation:

2a^-a-13=2

Subtract 2 from both sides :

2a^2-a-13=2=2-2

2a^2-a-15=0

Factor left side of the equation :

(2a+5) (a-3)=0

Set factors equal to 0 :

2a+5=0 or  a-3=0

a=-5/2   or a=3

You might be interested in
Select the correct answer.
Digiron [165]
C because if you plug one into the other the answer comes out as x and that is how you know it is an inverse
7 0
3 years ago
Y=3x+13<br> 2x=y-9<br> Solve for x and y points using addition method
GrogVix [38]
y=3x+13 \\&#10;2x=y-9 \ \ \ |-y-2x \\ \\&#10;y=3x+13 \\&#10;\underline{-y=-2x-9} \ \ \ \hbox{add the sides} \\&#10;y-y=3x-2x+13-9 \\&#10;0=x+4 \\&#10;x=-4 \\ \\&#10;y=3x+13=3 \times (-4)+13=-12+13=1 \\ \\&#10;\boxed{(x,y)=(-4,1)}
6 0
4 years ago
Read 2 more answers
Each of the four sides of a swimming pool measures 12 m the pool is 6 m deep how much water will be needed to fill completely
Alex_Xolod [135]

The amount of water needed to fill the swimming pool completely is 864 cubic meters.

Given that each of the four sides of a swimming pool measures 12 m the pool is 6 m deep.

"Volume" is a mathematical quantity that indicates the amount of three-dimensional space occupied by an object or surrounding surface. Volume units are cubic units like m³, cm³, in³, etc.

As we know, the swimming pool is in cubic shape.

So, we will find the volume of cube using the formula V=l×b×h.

Here, l=12m, b=12m and h=m.

Now, we want to substitute the values in the formula, we get

V=12m×12m×6m

V=864m³

Hence, the amount of water needed to fill completely the swimming pool whose each of the four sides of a swimming pool measures 12 m the pool is 6 m deep is 864 cubic meters.

Learn more about the volume of cube from here brainly.com/question/1972490

#SPJ9

4 0
2 years ago
What is the value of x?
Vlad1618 [11]

Answer:

A

Step-by-step explanation:

using pythagoras theorem

h²=p²+b²

8 0
3 years ago
The ratio of the number of boys to girls the number of girls in the school 729 and there are 1248 students in the school how man
DerKrebs [107]

Answer:

<em> 1005 girls</em>

Step-by-step explanation:

From the question we are given ratio of boys to girls as 7 : 29

Total ratio will be 7 + 29 = 36

Total students in the school = 1248 students

Number of girls in the school = 29/36 * 1248

Number of girls in the school = 29 * 35

Number of girls in the school  = 1005

<em>Hence the approximate total number of girls in the school is 1005 girls</em>

<em></em>

<em>Note that the ratio was assumed since we are not given in question</em>

6 0
3 years ago
Other questions:
  • Heather places 32 stamps in groups of 8hoe many groups of stamps are there
    11·2 answers
  • Which numbers are the extremes of the proportion shown below
    13·1 answer
  • Penny reads 12 pages in 1/2 hour. What is the unit rate for pages per hour? For hours per page
    14·1 answer
  • What's the area for number 5 and 6
    15·1 answer
  • How many vertices does the following shape have?
    6·1 answer
  • Below is a set of data about temperatures. The range of a set of data is the distance between the lowest and highest value in th
    9·1 answer
  • To complete the equation and
    10·2 answers
  • Wendy wants to run 3 miles. Each lap around the track at her school is mile.
    10·1 answer
  • A community center is collecting blankets. The director of the center has asked 135 families to donate 3 blankets each. If 20% o
    5·1 answer
  • A mother is 25 years older than her son. <br>Write down the son's age and the mother's age<br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!