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2 years ago

12

Solve this system of linear equations. separate the x- and y- values with a coma.

1 answer:

brilliants [131]2 years ago

3 0

The solution is (2, -4).

We can solve this with the elimination method. Multiply the first equation by -2 and then add the two equations.

-20x + -12y = 8
20x + 10y = 0 Add the two equations

-2y = 8
y = -4

Now, just input -4 for y into either equation, you will get 2 for x.

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Question 7(Multiple Choice Worth 75 points) Which of the following is true of all minerals? Made of many different elements Come

algol [13]

The true statement is that minerals come from the ground as crystals. Hope this helps!

4 0

3 years ago

A fruit company delivers its fruit in two types of boxes: large and small. A delivery of

Tema [17]

Answer:

Small box weighs 13.75 kg & large box weighs 15.75 kg

Step-by-step explanation:

We can write 2 simultaneous equation and solve for weight of each box.

<em>Let weight of large box be l and small box be s.</em>

<em />

"<u>3 large boxes and 5 small boxes has a total weight of 116 kilograms</u>":

$3l+5s=116$

and

"<u>9 large boxes and 7 small boxes has a total weight of 238 kilograms</u>":

$9l+7s=238$

<em>Now we can solve for l in the 1st equation and put it into 2nd equation and get s:</em>

<em> $3l+5s=116\\3l=116-5s\\l=\frac{116-5s}{3}$ </em>

<em>now,</em>

<em> $9l+7s=238\\9(\frac{116-5s}{3})+7s=238\\3(116-5s)+7s=238\\348-15s+7s=238\\348-238=15s-7s\\110=8s\\s=\frac{110}{8}=13.75$ </em>

<em />

<em>now we plug in 13.75 into s into equation of l to find s:</em>

<em> $l=\frac{116-5s}{3}\\l=\frac{116-5(13.75)}{3}\\l=15.75$ </em>

5 0

3 years ago

PLEASE HELP ME!! 100 points

Yakvenalex [24]

Square root (8-0)^2 + (8+7)^2

square root 64+15^2

=8+15
= 23

8 0

3 years ago

Read 2 more answers

Solve 6^x=1,296<br><br><br> X=__________a0

Troyanec [42]

Answer:

x=4

Step-by-step explanation:

6^x = 1296

Take the log base 6 on each side

log6(6^x) = log6(1296)

Rewrite 1296 as 6^4

x = log 6(6^4)

We know that log( a^b) = b log (a)

x = 4 log6(6)

We know that loga(a) =1

x = 4 *a

x =4

5 0

2 years ago

Read 2 more answers

A large aquarium should contain 10,000 liters of water when it is filled correctly. It will overflow if it gets up to 12,000 lit

never [62]

Answer:

The water level is rising because it is filling 10 more liters than it is draining

16.7 hours

Step-by-step explanation:

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3 years ago