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3 years ago

HELP PLZ; 20 POINTS

1 answer:

6 0

(a) 1A 2A 3A 1B 2B 3B (6 possible outcomes

(b) Possible outcomes for A or 1 are 1A 2A 3A and 1B ( 4 outcomes) therefore:
Probabilty = 4/6 = 2/3

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Which expression is equivalent to 56 + 21?

Vladimir79 [104]

$\text{Hey there!}$

$\text{There's a lot of expressions that can be equivalent to that!}$

$\text{We will just use: 7(8 + 3)}$

$\text{Let's check to make sure it is accurate!}$

$\text{7(8 + 3)}\\\text{7(8) = 56}\\\text{7(3) = 21}\\\text{56 +21}\\\\\boxed{\boxed{\text{Thus, your answer is: 7 (8 + 3)}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

~ $\frak{LoveYourselfFirst:)}$

7 0

3 years ago

Two lines perpendicular to the same plane are?

beks73 [17]

Answer:

C. parallel lines

Explanation:

If two straight lines be at right angles to the same plane, the straight lines would be parallel.

5 0

3 years ago

A model of the is 2.9 ft tall and 1.2 ft wide. The Eiffel Tower is actually 410 ft wide. What is the actual height of the Eiffel

LenaWriter [7]

The Eiffel Tower is exactly 1,063 ft tall.

6 0

3 years ago

Lauren brings brownies to class one day. She gives 3/5 of them to her friends Gareth, Tammy, and Camilla. If she gave them 21 br

fomenos

If 3/5 of all the brownies is 21, then 5/3 of 21 is the number of the brownies that Lauren brought in.

That probably sounded super confusing. When multiplying a number by a reciprocal of a fraction (a fraction where the numerator and denominator is reversed), the previous fraction multiplication is reversed.

Multiplying 21 with 5/3 will give us the original number of brownies.

$21 \times \dfrac{5}{3}=35$

Lauren originally brought 35 brownies.

3 0

3 years ago

Read 2 more answers

constructing a border around a pool a circular pool measures 10 feet across. one cubic yard of concrete is to be used to create

Paha777 [63]

Answer:

We get w = 1.508 feet.

Step-by-step explanation:

Let w be the width of the border.

The diameter of the pool will be 10 feet.

The depth will be 3 inches. So, we will convert it to feet.

3 inches = $\frac{3}{12}=0.25 feet$

The circular area including pool and the border, radius = $(w+5)$

Border area = Total area - pool area

= $\pi (w+5)^{2} -\pi (5)^{2}$

Putting pi = 3.14 and solving the expression we get the following equation:

$3.14w^{2}+31.4w-53.5$

As given one cubic yard of concrete is to be used, this is the volume to be used.

1 cubic yard = 27 cubic feet

Now using the volume given and thickness of this area that is 0.25 feet.

$0.25(3.14w^{2}+31.4w-53.5) =27$

$=> 0.785w^{2}+7.85w-13.375-27= 0$

$=> 0.785w^{2}+ 7.85w-13.625= 0$

Solving this quadratic equation, we get w = 1.508 feet and w = -11.508 feet.

Neglecting the negative value, we get w = 1.508 feet.

3 0

3 years ago