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
ivolga24 [154]
3 years ago
15

What is -4x+y=6 and -5x-y=21 in subsitution

Mathematics
1 answer:
kifflom [539]3 years ago
8 0
Solve for y in the first equation.
y = 4x + 6
Substitute <span>4x + 6 into the second equation.
-5x - (</span><span>4x + 6) = 21
Distribute
-5x - 4x - 6 = 21
Combine like terms 
-9x = 27
Divide both sides by -9
x = -3
Substitute back into first equation
-4(-3) + y = 6
Solve for y
y = -6</span>
You might be interested in
Can somebody help me with this?​
Ghella [55]

Answer:

x=11

Step-by-step explanation:

Since this is a 90º angle, 46º+(4x)º has to equal 90º, and you can make and solve an equation for this:

46+4x=90

4x=44

x=11

Check:

46+4x=90

46+4(11)=90

46+44=90

90=90

6 0
3 years ago
Complex numbers are often used when dealing with alternating current (AC) circuits. In the equation V = IZ, V is voltage, I is c
gizmo_the_mogwai [7]
V=IZ\\\\1+i=I\cdot(2-i)\quad|:(2-i)\\\\\\I=\dfrac{1+i}{2-i}=\dfrac{(1+i)(2+i)}{(2-i)(2+i)}=\dfrac{2+i+2i+i^2}{2^2-i^2}=\dfrac{2+3i-1}{4-(-1)}=\dfrac{1+3i}{5}\\\\\\\\\boxed{I=\frac{1+3i}{5}=\frac{1}{5}+\frac{3}{5}i}
4 0
3 years ago
Is 0.95x 10^8 a scientific notation
andrew-mc [135]
Yes, it is a scientific notation, please mark brainliest
3 0
1 year ago
David express company was asked to deliver 325 boxes of apples. according the rule, the delivery fee is
Andrew [12]

Answer:

22 boxes were lost.  Look for the happy squirrels.

Step-by-step explanation:

Let x be the number of lost boxes.  David Express should expect to receive  $25 for each of the 325 boxes of apples.  That means:

($25)*(325) = $8125

The loss of a box means that the delivery fee would be forfeited, which would amount to:  x*($25)

But a compensation fee of $75/box also applies, so the total loss to the income would be x*($25+$75) or x*($100).  This would be subtracted from the total expected income of $8125:

Resulting Income:   $8125 - ($100)x = $5925

$8125 - ($100)x = $5925

$8125 - ($100)x = $5925

-100x = -2200

x = 22 boxes were lost.                    Zounds! [A metric term for %$%^&]

===================

<u>Check:</u>  Does the loss of 22 of the 325 boxes result in a total payment of $5925?

Delivered boxes:  (325 - 22) = 303 boxes delivered.  303*$25 = $7575

Penalty of $75 per lost box:  22*($75) = $1650

Result:  $7575 - $1650 = $5925  <u>YES</u>

3 0
2 years ago
Everything from the picture
RoseWind [281]

Answer:

I would hire Master remodeling. the cost for certified remodeling is 250 and the cost for master remodeling is 220

7 0
3 years ago
Other questions:
  • Find the velocity, v(t), for an object moving along the x-axis if the acceleration, a(t), is a(t) = 3t^2 + cos(t) and v(0) = 2.
    15·1 answer
  • What are the next three terms of the arithmetic sequence -18, -13, -8, -3,…?
    5·1 answer
  • 5x+4+11x distributive property
    13·1 answer
  • Witch is bigger -5 or -55
    12·2 answers
  • The length of the diagonal of a rectangle is 181 inches.
    12·1 answer
  • What is 2.475 as a fration in its lowest form?
    8·2 answers
  • Colton is going to invest $76,000 and leave it in an account for 15 years. Assuming the interest is compounded daily, what inter
    14·1 answer
  • Why are these triangles similar?
    12·2 answers
  • Solve for x. Write both solutions, separated by a<br> comma.<br> 9x^2+ 3x – 2 = 0
    9·1 answer
  • For my younger brother no links or bots
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!