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3 years ago

PLEASE ANSWER ASAP!!!!!!!!!!!!!!! 99 POINTS!!!

Mathematics

2 answers:

irga5000 [103]3 years ago

7 0

None at all acctully

alexandr1967 [171]3 years ago

3 0

None of them because the first one is 6x-8y and the second one is 6x + 8y

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What is .4667 as a fraction

Alexxx [7]

Answer:

4667 /10000

If you round it up it should be 1/2

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2 years ago

Gavin earned $12.58 and Niko earned $9.35 last week doing chores. They

koban [17]

Answer:

13.07

Step-by-step explanation:

Subtraction dude.

7 0

2 years ago

A puppy store has a puppy that weighs 72 ounces how many pounds does it weigh 1 pound = 16 ounces

tresset_1 [31]

4.5 pounds

72 ounces

HOW-TO:

1. we know that 1 pound is 16 ounces.

So let's find how many of 16 are needed for 72.

72 ÷ 16 = 4.5

Use that answer and multiply it by the number of pounds per 16 ounces.

You get 4.5 pounds.

4 0

3 years ago

Which ordered pair is the solution to the system of equations?

brilliants [131]

X+y=-1
3x-y=21
add them equations

x+y=-1
3x-y=21 +
4x+0y=20

4x=20
divide by 4
x=5

x+y=-1
5+y=-1
minus 5 both sides
y=-6

(x,y)
(5,-6)

D is answer

3 0

3 years ago

Solve the system of equations.

guajiro [1.7K]

Answer:

Option b. (x = 3, y = 20, z = -14)

Step-by-step explanation:

Given:

2x + 2y + 3z = 4

5x + 3y + 5z = 5

3x + 4y + 6z = 5

Solve using Cramer’s rule

∴ $\left[\begin{array}{ccc}2&2&3\\5&3&5\\3&4&6\end{array}\right] =\left[\begin{array}{ccc}4\\5\\5\end{array}\right]$

∴A = $\left[\begin{array}{ccc}2&2&3\\5&3&5\\3&4&6\end{array}\right] = -1$

Ax = $\left[\begin{array}{ccc}4&2&3\\5&3&5\\5&4&6\end{array}\right] = -3$

Ay = $\left[\begin{array}{ccc}2&4&3\\5&5&5\\3&5&6\end{array}\right] =-20\\$

Az = $\left[\begin{array}{ccc}2&2&4\\5&3&5\\3&4&5\end{array}\right] = 14$

∴ x = Ax/A = -3/-1 = 3

y = Ay/A = -20/-1 = 20

z = Az/A = 14/-1 = -14

So, the answer is option b. (x = 3, y = 20, z = -14)

4 0

3 years ago