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3 years ago

I need all the spaces filled in please :)

Mathematics

1 answer:

Artist 52 [7]3 years ago

7 0

Answer:

3x + y = -16

Step-by-step explanation:

Explanation:-

Given a system of equations are

5x+6y =-5

- 2x - 5y = -11

multiply '1' and Adding two system of equtions

+ 1 (5x + 6y = -5)

+ 1 ( -2x - 5y = -11)

3x + y = -16

Final answer:-

5x + 6y = -5

-2x - 5y = -11

3x + y = -16

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if a cookie jar has 24 cookies how many cookies are left in the jar after eating some.How many cookies are in the jar after you

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Answer:

15&12

Step-by-step explanation:

24-9=15

15-3=12

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3 years ago

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An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum o

Whitepunk [10]

Answer:

Option B

Step-by-step explanation:

we know that

The sum of an arithmetic series is equal to

S=n(a1+an)/2

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a1 is the first term

an is the last term

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In this problem we have

n=20

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3 years ago

At noon a tank contains 6 cm of water after several hours it contains 3 cm of water what is the percent inecrease of water in th

Hitman42 [59]

Question:

At noon a tank contains 6 cm of water after several hours it contains 3 cm of water what is the percent decrease of water in the tank

Answer:

The percent Decrease of water in the tank is 50%

Step-by-step explanation:

Given:

Initial amount of water in the tank at the noon = 6 cm

amount of water remained in water after several hours = 3 cm

To Find:

The percent decrease =?

Solution:

The percent decrease in the tank

=> $\frac{\text {water present after some hours }}{\text {initial water contained in the tank }} \times 100$

Substituting the values

=> $\frac{3}{6} \times 100$

=> $\frac{1}{2} \times 100$

=> $\frac{100}{2}$

=> 50

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3 years ago

36x^3a+45xa^2=9xa( ) complete the statement.

Dafna1 [17]

9xa is the common factor.

You can complete the statement by dividing the two terms of the expression of the left side by 9xa, and you will get:

36x^3a + 45xa^2 = 9xa ( 4x^2 + 5a)

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Common factors of 50,30,100

umka21 [38]

Common factors of 50: 1, 2, 5, 10, 25, 50
Common factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Common factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, 100

You're welcome.

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