Solve the equation -6x-3y=-21 and 3x+y=6 by.combining the equations

Since some people need the points, here’s a question where you’ll just need to answer it with anything and I give it 5 stars and

mezya [45]

Answer:

thank you very much

Step-by-step explanation:

4 0

2 years ago

The radius of a cylinder is 7 c m and its height is 10 c m. Find curved surface area and volume.

erma4kov [3.2K]

Answer:

CSA of the cylinder = 440 sq. cm

Volume of the cylinder = 1540 cu. cm

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Step-by-step explanation:

Given:

Radius of the cylinder = 7 cm
Height of the cylinder = 10 cm

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To Find:

Curved surface area
Volume

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Solution:

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Using formula:

$\dashrightarrow \: \: { \underline{ \boxed{ \pmb{ \sf{ \purple{CSA \: of \: cylinder = 2\pi rh}}}}}} \: \star \\ \\$

Substituting the required values: 

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$\dashrightarrow \: \: \sf CSA {(cylinder)} = 2 \times \dfrac{22}{7} \times 7 \times 10 \\ \\ \\ \dashrightarrow \: \: \sf CSA {(cylinder)} = 2 \times 22 \times 10 \\ \\ \\ \dashrightarrow \: \: \sf CSA {(cylinder)} = 44 \times 10 \\ \\ \\ \dashrightarrow \: \: \sf CSA {(cylinder)} = 440 \: {cm}^{2} \\ \\ \\$

Now,

$\dashrightarrow \: \: { \underline{ \boxed{ \pmb{ \sf{ \purple{Volume {(cylinder)}= \pi {r}^{2} h}}}}}} \: \star \\ \\ \\$

Substituting the required values, 

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$\dashrightarrow \: \: \sf Volume {(cylinder)}= \dfrac{22}{7} \times {(7)}^{2} \times 10 \\ \\ \\ \dashrightarrow \: \: \sf Volume {(cylinder)}= \frac{22}{7} \times 49 \times 10 \\ \\ \\ \dashrightarrow \: \: \sf Volume {(cylinder)}= 22 \times 7 \times 10 \\ \\ \\ \dashrightarrow \: \: \sf Volume {(cylinder)}= 1540 {cm}^{3} \\ \\ \\$

Hence,

CSA of the cylinder = 440 sq. cm

Volume of the cylinder = 1540 cu. cm

8 0

2 years ago

Read 2 more answers

Distributive property ( help me and show work first one to answer right gets brainiest answer )

Lapatulllka [165]

8^2 /2+5(15-7)

=64/2+75-35
=32+40
=72

3(5−9)+4(4−9)
=(3)(−4)+4(4−9)
=−12+4(4−9)
=−12+(4)(−5)
=−12+−20
=−32

10(9−18)−32
=(10)(−9)−32
=−90−32
=−90−9
=−99

−12(5−7)−10(2−5)
=(−12)(−2)−10(2−5)
=24−10(2−5)
=24−(10)(−3)
=24−(−30)
=54

6 0

3 years ago

Read 2 more answers

Which problem is molded by the equation 4x-5=45?

kolezko [41]

Answer: B.

Step-by-step explanation:

See attached. We examine the equation and decide which situation, or problem, models it correctly.