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3 years ago

Can anybody help me with these two questions

Mathematics

1 answer:

sladkih [1.3K]3 years ago

4 0

Answer:

#1 is 39

#2 is 10 1/2

Step-by-step explanation:

Hopefully this helped, if not HMU and I will try my best to get you a better answer!

Have a great thanksgiving break :)

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Examplelt: A wall of length 10 m was to be built across an open ground. The height of the wall is 4 m and thickness of the wall

harina [27]

Answer :

4167 bricks.

Explanation :

Since the wall with all its bricks makes up the space occupied by it, we need to find the volume of the wall, which is nothing but a cuboid.

Here,

${\qquad \dashrightarrow{ \sf{Length=10 \: m=1000 \: cm}}}$

$\qquad \dashrightarrow{ \sf{Thickness=24 \: cm}}$

$\qquad \dashrightarrow{ \sf{Height=4 m=400 \: cm}}$

Therefore,

${\qquad \dashrightarrow{ \bf{Volume \: of \: the \: wall = length \times breadth \times height}}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: the \: wall = 1000 \times 24 \times 400 \: {cm}^{3} }}}$

Now, each brick is a cuboid with Length = 24 cm, Breadth = 12 cm and height = 8 cm.

So,

${\qquad \dashrightarrow{ \bf{Volume \: of \: each \: brick = length \times breadth \times height}}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: each \: brick = 24 \times 12 \times 8 \: {cm}^{3} }}}$

So,

${\qquad \dashrightarrow{ \bf{Volume \: of \: bricks \: required = \dfrac{volume \: of \: the \: wall}{volume \: of \: each \: brick} }}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: bricks \: required = \dfrac{1000 \times 24 \times 400}{24 \times 13 \times 8} }}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: bricks \: required = \bf \: 4166.6} }}$

Therefore,

The wall requires 4167 bricks.

6 0

2 years ago

Anyone want to help me with this? I will mark brainliest and thanks

Degger [83]

Answer:

x = -8

m∠BDC = 68°

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Geometry

Definition of a Line: A line is 180°

Step-by-step explanation:

Step 1: Set up Equation

m∠BDC + m∠CDA = 180°

(-7x + 12)° + (-8x + 48)° = 180°

Step 2: Solve for x

Combine like terms: -15x + 60 = 180
Isolate x term: -15x = 120
Isolate x: x = -8

Step 3: Find m∠BDC

Define: m∠BDC = (-7x + 12)°
Substitute in x: m∠BDC = (-7(-8) + 12)°
Multiply: m∠BDC = (56 + 12)°
Add: m∠BDC = 68°

6 0

3 years ago

The starting line for a race in Cass is 2.4 miles from the finish line. On a map of the course,

DaniilM [7]

Answer:

5 in. = 2 mi.

Step-by-step explanation:

2.4mi = 6in

1 mi = 2.5in

2.5 inches = 1mile

Convert to whole #'s as the question asks

5 in. = 2 mi

-- Gage Millar, Algebra 1/2 Tutor (Pending Pre-Calc Tutor)

7 0

2 years ago

Read 2 more answers

There are 24 muffins in a bakery.If 3/8 of the muffins are blueberry,how many muffins are blueberry?

S_A_V [24]

Answer:

There are 9 blueberry muffins.

Step-by-step explanation:

In order to find this amount, we need to multiply the fraction that represents blueberry muffins by the total number of muffins.

24 * 3/8 = 9

3 0

4 years ago

Read 2 more answers

The manager of a supermarket records the waiting times of 100 customers.

Arte-miy333 [17]

Answer:

42, 80, 91, 40.5, 256

Step-by-step explanation:

times the f column by the x column

8 0

3 years ago

Can anybody help me with these two questions​

Can anybody help me with these two questions