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3 years ago

Which expression is equivalent to 15 plus 3 x?

Mathematics

1 answer:

Dmitrij [34]3 years ago

3 0

Answer:

3(5+x)

Step-by-step explanation:

Another expression that can equal 15+3x is 3(5+x)

Use Distributive Property:

3(5+x)

=15 + 3x.

I wish you the best of luck, and hopefully this is an option on your homework!

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Answer:

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Step-by-step explanation:

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3 years ago

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What is the value of n in the equation ?Solve the equation. –9x + 1 = –x + 17

vazorg [7]

Answer:

-2

Step-by-step explanation:

→ -9x + 1 = -x + 17

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2 years ago

Solve the system algebraically. 3x - 2y - 1 = 0 y = 5x + 4 What is the solution?

Bogdan [553]

Answer:

$x=\frac{-9}{7}$

$y=\frac{-17}{7}$

Step-by-step explanation:

We have been given the equation:

$3x-2y-1=0$

And $y=5x+4$

Second equation can be rewritten as:

$5x-y=-4$

We will solve the equations:

$3x-2y=1$ (1)

$5x-y=-4$ (2)

Multiply equation (1) by 5 and equation (2) by 3 we get:

$15x-10y=5$ (3)

$15x-3y=-12$ (4)

Now, subtract (4) from (3) we get:

$-7y=17$

$y=\frac{-17}{7}$

Now substitute $y=\frac{-17}{7}$ in equation (1) we get:

$3x-2{\frac{-17}{7}}=1$

$3x+\frac{34}{7}=1$

$21x=-27$

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$x=\frac{-9}{7}$

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3 years ago

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scZoUnD [109]

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3 years ago

Help me to do 10(b) answer

antiseptic1488 [7]

Answer:

Step-by-step explanation:

Big circle:

R = radius = diameter ÷2 = 42 ÷ 2 = 21 cm

Area of big circle= πR²

$=\dfrac{22}{7}*21*21=22*3*21\\\\\\= 1386 \ cm^{2}$

Small circle:

Diameter of small circle = radius of big circle = 21 cm

r = 21/2 = 10.5 cm

Area of small circle = πr²

$=\dfrac{22}{7}*10.5*10.5 = 22 * 1.5*10.5\\\\\\= 346 .5 \ cm^{2}$

Area of shaded region = area of big circle - area of small circle

= 1386 - 346.5

= 1039.5 cm²

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2 years ago