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11 months ago

Solve for X and y PLEASE GIVE FULL EXPLANATION HOW YOU GOT IT

Mathematics

1 answer:

Dennis_Churaev [7]11 months ago

4 0

Answer:

(1, -1)

Step-by-step explanation:

we isolate y in the first equation

2x+y=1

-2x. -2x

y=1-2x

and now we fill y into second equation

4x-2(1-2x)=6

4x-2+4x=6

8x-2=6

+2 +2

8x=8

/8 /8

x=1

and now to find y we insert x

2(1)+y=1

2+y=1

-2. -2

y= -1

hopes this helps

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Slove the inequality 5(x + 1) <25 x < 4 x > -4 x > 4 Pls help meee

viktelen [127]

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Use the distributive property to make 5x+5.

5x+5<25

Subtract 5 from both sides.

5x<20

Divide both sides by five.

x<4

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2 years ago

Radium-226 has a half life of 1622 years. If you start off with a 200

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Answer:

≈23.6 kg left.

Step-by-step explanation:

For determining this, we can simply use an exponential decay equation representing this scenario:

$y= a(0.5)^{\frac{t}{h} }$

a: the initial amount

t: the amount of time

h: the half life

Now, substitute the numbers into the equation:

$y=200(0.5)^{\frac{5000}{1622} }$

Now, solve this equation:

$y=220(0.5)^{3.08}$

Use a calculator to solve for y:

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y≈23.6 kg left.

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3 years ago

How many 3/4 cup servings are in 7/8 cup of pudding

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Answer:

Step-by-step explanation:

7/8 ÷ 3/4 is the same as saying 7/8 • 4/3

answer: 1.2 or 1 1/5 or 6/5

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3 years ago

I am a 3-digit number with 7 in the tens place. My hundreds digit is

Vsevolod [243]

Answer:

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473

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574

573

572

571

570

675

674

673

672

671

670

776

775

774

773

772

771

770

877

876

875

874

873

872

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Step-by-step explanation:

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2 years ago

Cube A has a volume of 9 in3. Cube B has a volume of 5 in3. Which of the following expresses the ratio of the side length of Cub

Troyanec [42]

Using the formula for the volume of a cube, it is found that the expression which gives the ratio of the side length of Cube A to the side length of Cube B is:

$r = \frac{3^{\frac{2}{3}}}{5^{\frac{1}{3}}}$

Which means that option E is correct.

The volume of a cube of side length l is given by:

$V = l^3$

For Cube A, the volume is of 9 cubic inches, hence:

$l_a^3 = 9$

$l_a = \sqrt[3]{9}$

$l_a = 9^{\frac{1}{3}}$

$l_a = 3^{\frac{2}{3}}$

For Cube B, the volume is of 5 cubic inches, hence:

$l_b^3 = 5$

$l_b = \sqrt[3]{5}$

$l_b = 5^{\frac{1}{3}}$

Then, the ratio is:

$r = \frac{l_a}{l_b} = \frac{3^{\frac{2}{3}}}{5^{\frac{1}{3}}}$

To learn more about the volume of a cube, you can take a look at brainly.com/question/13030328

5 0

2 years ago