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3 years ago

Pls help for brainliest!!! thx so much :D

Mathematics

1 answer:

Ber [7]3 years ago

3 0

A = (3.14)r^2

1) the diameter is 14m, half of that value will be the radius.

r = 7

A = (3.14) r^2

A = 153.9 meters cubed

2) A = (3.14) 12^2 = 452.2 mm cubed

3) A = (3.14) 10^2 = 314 yd cubed

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if anyone can solve this gets a $10 gamestop card i already got the codeSolve for x. Show each step of the solution. 2.5(10 - x)

schepotkina [342]

Remark

Forget the Gamestop. I'd never use it. This one is on the house.

Solution

2.5(10 - x) + 10 = 72 - 1.5x*(5x + 12) The first step is to remove the brackets. Be very careful you understand the bracket on the right.

25 - 2.5x + 10 = 72 - 7.5x - 18 Study the signs carefully. Collect like terms.

35 - 2.5x = 54 - 7.5x Add 7.5x to both sides.

35 - 2.5x + 7.5x = 54 - 7.5x + 7.5x

35 + 5x = 54 Subtract 35 from both sides.

5x = 19 Divide by 5

x = 19/5

x = 3 4/5 = 3.8

Check

When you numbers are so cumbersome, you should check the answer.

LHS

2.5(10 - 3.8) + 10

2.5(6.2) + 10

15.5 + 10

25.5

RHS

72 - 1.5(5*3.8 +12)

72 - 1.5(19 + 12)

72 - 1.5(31)

72 - 46.5

25.5

RHS = LHS The solution checks.

4 0

4 years ago

A soccer player boasts that he is able to kick a ball past 100 yards on 5 consecutive tries. You know that he's usually able to

adell [148]

Let 0-1 be successes and 2-9 be failures. Using the simulation, we get:

5642188976548932[001]546504987461321077410

The most consecutive kicks he gets past one hundred yards is A. three.

8 0

4 years ago

Can somebody please help me out please my grads are bad

Vika [28.1K]

Answer:

a) 10 inches

b) 48 feet

Step-by-step explanation:

10 inches, 60/6 = 10

48 feet, 8*6 = 48

7 0

3 years ago

I WILL MARK BRAINLIEST PLEASE HELP FIND ANGLE DEB ITS DUE AT 12 PLEASE HELP PLEASE

Gemiola [76]

Answer:

$\boxed {\boxed {\sf \angle DEB = 111 \textdegree}}$

Step-by-step explanation:

We want to find angle DEB. We know AB is perpendicular to AC, CD is congruent to CE and angle B is 48 degrees.

ABC is a triangle. The angles in a triangle must add up to 180 degrees. Therefore:

∠A+∠B+∠C= 180°

We know two angles: ∠B= 48° and ∠A= 90° (the little square denotes a right angle).

90°+48°+ ∠C= 180° Substitute values in.

138°+ ∠C =180° Add
138°-138° ∠C= 180°-138° Subtract 138 from both sides.
∠C= 42°

Note that angle C is part of another triangle. It is isosceles because the two legs (CD and CE) are congruent. Therefore, the two base angles (E and D) are congruent.

∠C+∠D+∠E= 180°
∠C+ 2∠D= 180° Angles D and E are congruent
42°+ 2∠D= 180° Substitute 42 in for angle C
42°-42° +2∠D= 180°-42° Subtract 42 from both sides.
2∠D= 138°
2∠D/2= 138°/2 Divide both sides by 2.
∠D= 69°

∠D and ∠E equal 69 degrees.

Angle CED (∠E) and DEB are on a straight line together. Therefore, they are supplementary and equal 180 degrees.

∠CED+ ∠DEB= 180
69° +∠DEB= 180° Substitute 69 for angle CED
69°-69° +∠DEB= 180°-69° Subtract 69 from both sides
∠DEB=111°

Angle DEB is equal to 111 degrees

8 0

3 years ago

What is 2 - 3y is less than or equal to 12? That was the question.

Ivenika [448]

Answer:

$2-3y\leq 12\\-2+2-3y\leq 12-2\\-3y\leq 10\\\frac{-3}{3}y\leq \frac{10}{3} \\y\geq \frac{10}{3}$

Step-by-step explanation:

8 0

3 years ago