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2 years ago

5+5 +3+3+4+4+5+5+&+&+7+7+8+8+9+9

Mathematics

1 answer:

worty [1.4K]2 years ago

8 0

Answer: 82

Step-by-step explanation: 5+5 +3+3+4+4+5+5+7+7+8+8+9+9

10+6+8+10+14+16+18

16+18+30+18

34+48

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Nolan's car used 2 gallons to travel 50 miles. How far can he travel on 3 gallons?

ElenaW [278]

Answer:

On 3 gallons, he could travel 75 miles

Step-by-step explanation:

50 / 2 = 25 miles per gallon

25 * 3 = 75miles

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3 years ago

What is the square root of -225

NemiM [27]

Answer:

15i

Step-by-step explanation:

since 15 x 15 is 225, the imaginary number comes into play here. i x i = -1, so 15i x 15i = -225

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3 years ago

Read 2 more answers

Solve the simultaneous equations

Contact [7]

Answer:

The solution for given system of equations is: x = 6 and y = 3

(6,3)

Step-by-step explanation:

Given equations are:

$3x+4y=30\ \ \ Eqn\ 1\\3x-y=15\ \ \ \ Eqn\ 2$

There are three methods to solve simultaneous equations

Elimination
Substitution
Co-efficient method

We will use the elimination method as the coefficients of x in both equations are already same

Subtracting equation 2 from equation 1

$3x+4y - (3x-y) = 30-15\\3x+4y-3x+y = 15\\5y = 15\\\frac{5y}{5} = \frac{15}{5}\\y = 3$

Putting y = 3 in equation 2

$3x-3 = 15\\3x = 15+3\\3x = 18\\\frac{3x}{3} = \frac{18}{3}\\x = 6$

Hence,

The solution for given system of equations is: x = 6 and y = 3

(6,3)

7 0

3 years ago

Last year a streaming subscription cost $25. This is year that price has increased by 20%. How much will a streaming subscriptio

il63 [147K]

Answer:

25/100 X 120 = 30

total streaming cost $30

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2 years ago

How to solve 22 – 3y > 7

nikklg [1K]

Answer:

y < 5

Step-by-step explanation:

22 – 3y > 7

=> 22 – 7 > 3y

=> 15 > 3y

=> y < 5

Therefore, y < 5 is the solution.

Hoped this helped.

3 0

2 years ago