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
oee [108]
3 years ago
15

25 POINTS!!!! PLEASE EXPLAIN TO ME STEP BY STEP!

Mathematics
2 answers:
Harman [31]3 years ago
8 0
-x-y-z=-8
-x-y-z=-8

Let's solve for x.<span><span><span><span>−x</span>−y</span>−z</span>=<span>−8
</span></span>Step 1: Add y to both sides.<span><span><span><span><span>−x</span>−y</span>−z</span>+y</span>=<span><span>−8</span>+y</span></span><span><span><span>−x</span>−z</span>=<span>y−8
</span></span>Step 2: Add z to both sides.<span><span><span><span>−x</span>−z</span>+z</span>=<span><span>y−8</span>+z</span></span><span><span>−x</span>=<span><span>y+z</span>−8
</span></span>Step 3: Divide both sides by -1.<span><span><span>−x</span><span>−1</span></span>=<span><span><span>y+z</span>−8</span><span>−1</span></span></span><span>x=<span><span><span>−y</span>−z</span>+8
</span></span>Answer: <span>x=<span><span><span>−y</span>−z</span>+<span>8</span></span></span>
Feliz [49]3 years ago
3 0
Easy peassy
so basically what you would try to do is eliminate one type of variable from 2 different equations
look, we have
2x+2z=4
that already has y eliminated
so we just need to eliminate y from another equation

so

we can eliminate the y from the 2nd equation
multiply the first equation by 4 and add to 2nd equation

-4x-4y-4z=-32
<u>-4x+4y+5z=7 +</u>
-8x-0y+1z=-25

-8x+z=-25


we have
-8x+z=-25 and
2x+2z=4

we can elminate the z's
multiply first (top) equation by -2 and add to bottom equaton
16x-2z=50
<u>2x+2z=4 +</u>
18x=54

18x=54
divide both sides by 18
x=3

sub back
2x+2z=4
2(3)+2z=4
6+2z=4
minus 6 both sides
2z=-2
divide 2
z=-1

sub back

-x-y-z=-8
-3-y-(-1)=-8
-3-y+1=-8
-2-y=-8
add 2 to both sides
-y=-6
times -1
y=6


x=3
y=6
z=-1
(x,y,z)
(3,6,-1)
You might be interested in
ANSWER ASAP!
morpeh [17]

Answer:

vvvvvcvv

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Calculate the angle of depression, x, if the boat is 750 ft. away from the light house and the light house is 300 ft high. Round
I am Lyosha [343]

Firstly , we need to draw diagram

we are given

opposite =300

adjacent =750

now, we can use tan formula

tan(x)=\frac{300}{750}

now, we can find x

x=tan^{-1}(\frac{300}{750})

we get

x=21.8  degree

so,

angle of depression is 21.8 degree.....Answer

8 0
3 years ago
Use the quadratic formula to find the solutions to the quadratic equation below 2x2 - 3x + 6 = 0​
Katarina [22]

Answer:

x=\frac{3}{4} +i\frac{\sqrt{39}}{4}, x=\frac{3}{4} -i\frac{\sqrt{39}}{4}\\

OR

x=\frac{3}{4} ±i\frac{\sqrt{39}}{4}\\

Step-by-step explanation:

6 0
3 years ago
The distance from one corner of a rectangular garden to the other is 13 ft. The length of the garden is 7 ft longer than the wid
coldgirl [10]

Answer:

  • dimensions: 12 ft by 5 ft
  • area: 60 ft²

Step-by-step explanation:

Let x represent the shorter dimension in feet. Then the longer one is x+7 and the Pythagorean theorem tells us the relation of these to the diagonal is ...

  x² + (x+7)² = 13²

  2x² +14x + 49 = 169 . . . . eliminate parentheses

  x² +7x -60 = 0 . . . . . subtract 169 and divide by 2

  (x +12)(x -5) = 0 . . . . factor the equation

  x = -12 or +5 . . . . . . . only the positive value of x is useful here.

The short dimension is 5 ft, so the long dimension is 12 ft. The area is their product, 60 ft².

_____

<em>Comment on finding the area</em>

The quadratic equation above can be rearranged and factored as ...

  x(x +7) = 60

Since the dimensions of the garden are x and (x+7), this product is the garden's area. This equation tells us the area is 60. We don't actually have to find the dimensions.

4 0
3 years ago
Solve for x 4x+15=71
Ilya [14]

Answer:

x=14

Step-by-step explanation:

4x +15 =71

4x =71 - 15

4x =56

x=56 :4

x=14

4 ×14 +15 =71

56 +15 =71

71 =71

7 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLEASE NEED ANSWER NOWWWWWWWWWW solve the following system of equation. Round your answer to the nearest tenth. Your ans
    5·1 answer
  • You flip a coin twice. Find the probability of the first flip lands tails-up and
    5·1 answer
  • Can someone help me
    11·1 answer
  • Find the midpoint of the line segment with the given endpoints. <br>(14, -6), (13, 14)<br>​
    9·2 answers
  • mrs. houston puts 5 ounces of snack mix in each bag how many pounds of snack mix does she need to fill 32 bags
    7·1 answer
  • The weight of a small bag of raisins of 3.0 times the weight of a large bag. The large bag weight 8.0 of a pound. what is the we
    9·1 answer
  • Evaluate:<br> 21°(3n + 7) = [?]
    12·1 answer
  • Express sin Q as a fraction in simplest terms.​
    14·2 answers
  • The points in the table lie on a line. Find the slope of the line.<br><br><br><br> slope:
    15·1 answer
  • Solve for x please −2(−3x−1)−4x+3=25
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!