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3 years ago

I am stuck and getting a head ache please help

Mathematics

1 answer:

astra-53 [7]3 years ago

7 0

Answer:

DF=20

Step-by-step explanation:

$\frac{9}{12}$ = $\frac{15}{DF}$

Use cross Multiplication

9DF=180

Divide 180 by 9

DF=20

Hope this helps! :)

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Show All your work!!

sveta [45]

Answer:

$\large\boxed{x$

Step-by-step explanation:

$-5x+2>37\qquad\text{subtract 2 from both sides}\\\\-5x+2-2>37-2\\\\-5x>35\qquad\text{change the signs}\\\\5x$

8 0

3 years ago

1. -222=-2x-3(4x+18)<br>2. 154=2x-6(-2x-14)<br>solve for x

Aleksandr [31]

Answer:

1. x = 12

2. x = 5

Step-by-step explanation:

1. -222 = -2x - 12x - 54

-222 = -14x - 54

-168 = -14x

x = 12

2. 154 = 2x + 12x + 84

154 = 14x + 84

70 = 14x

x = 5

4 0

3 years ago

A brand of clay brick tiles has the dimensions 3 5 8 by 7 5 8 by 1 2 inch. These thin bricks are commonly used for floors. Estim

raketka [301]

Answer: The cost to tile the floor is $318.24.

Step-by-step explanation:

Since we have given that

Dimensions of floor is 12 by 17 foot.

So, Area of floor would be

$12\times 17\\\\=204\ sq.\ foot$

As we know that 1 foot = 12 inch

So, Area of floor would be

$204\times (12)^2\\\\=204\times 144\\\\=29376\ sq.\ foot$

Dimension of brick tiles is given by

$3\dfrac{5}{8}\ by\ 7\dfrac{5}{8}\ by\ \dfrac{1}{2}$

So, Area of brick tiles is given by

$2(lb+bh+lh)\\\\=2(\dfrac{29}{8}\times \dfrac{61}{8}+\dfrac{61}{8}\times \dfrac{1}{2}+\dfrac{29}{8}\times \dfrac{1}{2})\\\\=2(\dfrac{1769}{64}+\dfrac{61}{16}+\dfrac{29}{16})\\\\=2\times \dfrac{1769+244+116}{64}\\\\=\dfrac{2129}{32}$

So, Number of clay brick would be

$29376\div \dfrac{2129}{32}\\\\=29376\times \dfrac{32}{2129}\\\\=\dfrac{29376\times 32}{2129}\\\\=441.53\\\\\approx 442$

cost of each clay brick = $0.72

So, Total cost of flooring would be

$442\times 0.72\\\\=\$318.24$

Hence, The cost to tile the floor is $318.24.

7 0

3 years ago

I need help! This is really hard for me

Goryan [66]

Total clay = πr²h = π x (4÷2)² x 6 = 12π in³

Clay ball = 4/3 x π x (1)³ = 4/3 π in³

Number of clay balls that can be made = 12π ÷ 4/3 π = 9

--------------------------------------------------
Answer: 9 clay balls.
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8 0

3 years ago

Use an addition property to solve for a. 10 + (–15) = –15 + a

swat32

10-15=-15+a

+15 +15

10=a

5 0

4 years ago

Read 2 more answers