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
earnstyle [38]
3 years ago
9

X + 8y = 18 and — 5x + 3y = -4

Mathematics
2 answers:
atroni [7]3 years ago
5 0
X+8y=18
-5x+3y=-4

Multiply the first equation by 5
Add the two equations together

5x+40y=90
-5x+3y=-4
43y=86
Y=2

Plug y into one equation to find x
X+16=18
X=2
yaroslaw [1]3 years ago
3 0

X+8y=18

-5x+3y=-4

Multiply the first equation by 5

Add the two equations together

5x+40y=90

-5x+3y=-4

43y=86

Y=2

Plug y into one equation to find x

X+16=18

X=2

You might be interested in
Name an angle vertical to EGH
DaniilM [7]

Answer:

think its acute

Step-by-step explanation:

yes im just bored sorry

4 0
2 years ago
Read 2 more answers
Consider the expression. (StartFraction 2 m Superscript negative 1 baseline n Superscript 5 Baseline Over 3 m Superscript 0 Base
suter [353]

Answer:

The correct option is option (3) 4 ÷ 25.

Step-by-step explanation:

The expression in terms of <em>m</em> and <em>n</em> is:

F(m,n)=[\frac{2m^{-1}n^{5}}{3m^{0}n^{4}}]^{2}

Exponent rule of division:

a^{x}\div a^{y}=a^{x-y}

Compute the value of the expression for <em>m</em> = -5 and <em>n</em> = 3 as follows:

F(m,n)=[\frac{2m^{-1}n^{5}}{3m^{0}n^{4}}]^{2}

F(-5,3)=[\frac{2\csdot (-5)^{-1}\cdot (3)^{5}}{3\cdot (-5)^{0}\cdot (3)^{4}}]^{2}

             =\{\frac{2}{3}\times [(-5)^{-1-0}\times (3)^{5-4}}]\}^{2}\\\\=\{\frac{2}{3}\times \frac{-1}{5}\times 3\}^{2}\\\\=\{-\frac{2}{5}\}^{2}\\\\=\frac{4}{25}

Thus, the correct option is option (3) 4 ÷ 25.

8 0
3 years ago
Read 2 more answers
A mixture of gases was found to have a total pressure of 950 mmhg gas number 1 has a pressure of 335 mmhg gas number 2 has a pre
frez [133]

Answer:

The pressure exerted by gas number 3 is 159 mmHg

Step-by-step explanation:

To answer this question, the law to Use is Dalton’s law of partial pressure

Dalton’s law of partial pressure states that for a mixture of gases which do not mix, the total pressure exerted by such gases is equal to the sum of the individual pressure.

Now for the three gases, the total pressure Pt is equal to P1 + P2 + P3

Now we have Pt = 950 mmHg, P1 = 335 mmHg and P2 = 456 mmHg

P3 = Pt-P1-P2

Plugging the values above, we have ; 950-335-456 = 159 mmHg

5 0
3 years ago
Anyone know how to do this?
OLEGan [10]
The answer to your question is the third statement 
8 0
2 years ago
3) Suppose you deposit $10,000 in a savings account that pays interest at an annual rate of 5%
jeyben [28]

9514 1404 393

Answer:

  3.67 years

Step-by-step explanation:

The amount is found using the compound interest formula.

  A = P(1 +r/n)^(nt)

for principal P invested at annual rate r compounded n times per year for t years.

We can solve this for t:

  A/P = (1 +r/n)^(nt) . . . . divide by P

  log(A/P) = (nt)log(1 +r/n) . . . . take the logarithm

  t = log(A/P)/(n·log(1 +r/n)) . . . . divide by the coefficient of t

Filling in the given values, we find ...

  t = log(12000/10000)/(4·log(1 +0.05/4)) ≈ 3.6692

It will take about 3.67 years for the balance to reach $12,000.

8 0
2 years ago
Read 2 more answers
Other questions:
  • HELP!!! Chords AB and BD intersect in circle O as shown in the diagram. Two of the angle measurements are marked. What is mCED?
    13·1 answer
  • 3,817,773 rounded to nearest 100,000
    8·1 answer
  • James and Simon have a reading assignment to complete. James has read r pages, and Simon has read 75 pages. Together they have r
    5·2 answers
  • 9) 4 = K/42<br> Solve that for me pls I’m writing here because I need twenty words
    15·1 answer
  • Sarah is making 4 batches
    13·1 answer
  • What is 15.7 rounded to the nearest tenth? Sorry, I'm bad at math XD.
    11·2 answers
  • An average American child aged 0-2 years old has about 915 minutes of screen time in 5 days. 6 times the difference between a ch
    5·1 answer
  • Roberto debe leer un libro que contiene 340 páginas en 4 días por lo cual planea la siguiente distribución: el primer día 1/5 de
    6·1 answer
  • Help I’ll give a lot of points
    12·2 answers
  • A passenger train is carrying 403 passengers in 13 cars. How many passenger are in each car?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!