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3 years ago

What is3456+2139+5547

Mathematics

2 answers:

Lady bird [3.3K]3 years ago

8 0

Answer:

The answer is 11,142.

Step-by-step explanation:

3456 + 2139 = 5595

5595 + 5547 = 11,142

Aleksandr [31]3 years ago

4 0

11142, this is the answer

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An airplane flies 105 miles in 1/2 hour how far can it fly in 1 and 1/4 at the same rate of speed

Zigmanuir [339]

262.5 miles.

105 x 2 = 210

105 ÷ 2 = 52.2

210 + 52.2 = 262.5 miles

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4 years ago

Plzzzzz helpppppp<br> What is one of the main duties of the national government?

juin [17]

Answer:

Step-by-step explanation:

The national gov protects/is responsible for maintaing security and stability like of which protecting our rights.

8 0

3 years ago

Marsha Waite borrows $7,000 and agrees to pay it back in 2 years if the simple interest rate is 15%

I am Lyosha [343]

Answer:

Marsha must pay in 2 years $\$9,100$

Step-by-step explanation:

we know that

The simple interest formula is equal to

$A=P(1+rt)$

where

A is the amount of money to pay

P is amount of money borrowed

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=2\ years\\ P=\$7,000\\ A=?\\r=15\%=15/100=0.15$

substitute in the formula above

$A=7,000(1+0.15*2)$

$A=7,000(1+0.30)$

$A=7,000(1.30)$

$A=\$9,100$

therefore

Marsha must pay in 2 years $\$9,100$

3 0

3 years ago

What is the probability of two dice has the sum less than 7

lidiya [134]

Answer:2/7

Step-by-step explanation:

7 0

3 years ago

Please do elimination method 2x-9y=-36 <br> -14x+18y=-18

Varvara68 [4.7K]

Answer:

The solution to the system of equations will be:

$x=9,\:y=6$

Step-by-step explanation:

Given the system of equations

$\begin{bmatrix}2x-9y=-36\\ -14x+18y=-18\end{bmatrix}$

Multiply 2x-9y=-36 by 7

$14x-63y=-252$

so the system of equations becomes

$\begin{bmatrix}14x-63y=-252\\ -14x+18y=-18\end{bmatrix}$

Adding both equations

$-14x+18y=-18$

$+$

$\underline{14x-63y=-252}$

$-45y=-270$

solve -45y = -270 for y

$-45y=-270$

divide both sides by -45

$\frac{-45y}{-45}=\frac{-270}{-45}$

Simplify

$y=6$

For 14x-63y = -270 plug in y = 6

$14x-63\cdot \:6=-252$

$14x-378=-252$

Add 378 to both sides

$14x-378+378=-252+378$

Simplify

$14x=126$

Divide both sides by 14

$\frac{14x}{14}=\frac{126}{14}$

Simplify

$x=9$

Therefore, the solution to the system of equations will be:

$x=9,\:y=6$

7 0

3 years ago