3 years ago

3x-5y=60 4x+5y=-4 what is the system of linear equation

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

4 0

(3x-5y=60)

4x+5y=-4

3(8)-5(7.2)=60

4(8)+5(-7.2)=-4

7x=56

÷7. ÷7

x=8

3(8)-5y=60

4(8)+5y=-4

32+5y=-4

-32. -32

5y=-36

÷5. ÷5

y=7.2

You might be interested in

Which expression is equivalent to 2 3/5 divided by 7/9?

stealth61 [152]

Step-by-step explanation:

$2 \frac{3}{5} \div \frac{7}{9 } \\ \frac{13}{5} \times \frac{9}{7} \\ = \frac{117}{35}$

6 0

2 years ago

Evaluate the expression below when x = 4 and y = 12.<br> 5х^2 — Зу

Zina [86]

Answer:

Step-by-step explanation:

x = 4 and y = 12.

5х² - 3у

20x - 3y

80 - 36

8 0

3 years ago

A hair salon uses 4 bottles of shampoo for every 3 bottles of conditioner

liraira [26]

Answer:

4 8 12 16

3 6 9 12

Step-by-step explanation:

8 0

3 years ago

Which numbers for b would make √b irrational<br><br>mark as brilliant!

just olya [345]

Answer:

All of the options when substituted for b will make the root of b irrational

Step-by-step explanation:

Mathematically, surds are roots of non-perfect squares and they are tagged as irrational numbers

For b to be irrational, all of the numbers given would fit. This is because all of these numbers are non-perfect squares meaning they do not have square root.

So what this mean is that these numbers when put under the root umbrella are irrational numbers as they are not perfect squares

8 0

3 years ago

There are 220 students in year 9.

olganol [36]

20% of 220 is 44 people so if you divide 220 by 2 you have 110 of each then add 44 to one and subtract 44 from the other the answer to a is 154 and the answer to b is 66

8 0

3 years ago