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kotykmax [81]
2 years ago
6

A wall is 20 inches thick. 6 inches is​ concrete, 9 inches is​ brick, and 5 inches is limestone. What fraction of the wall is​ c

oncrete?
Mathematics
2 answers:
Citrus2011 [14]2 years ago
8 0

Answer:

30%

Step-by-step explanation:

NNADVOKAT [17]2 years ago
4 0

Answer:

6/20 or 30%

Step-by-step explanation:

As the entire thickness of the wall is 20 inches it becomes our base. Then we find how much of that is concrete (6 inches) and put it as our numerator.  

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There are 3 identical wooden blocks with dimensions 30×4×3. If you glue them together, what is the smallest surface area you can
Inga [223]

Answer:

120

Step-by-step explanation:

5 0
2 years ago
A recipe for chocolate chip cookies calls for 1 1/4 cups of flour .If you are making 2 1/4 recipes,how many cups of flour are ne
Oksana_A [137]

Answer:

2 11/12 cups of flour

Step-by-step explanation:

2 recipes are 2 1/2 cups of flour  

1/3 is 1/3 x 1 1/4= 1/3 + 1/12= 5/12  

So, 2 11/12 cups of flour

4 0
2 years ago
A certain shade of green paint is made by mixing blue and yellow paint. The relationship between the number of quarts of blue pa
lana66690 [7]

Answer:

2 quartz of the blue paint for every 10 quartz of yellow paint

Step-by-step explanation:

The graph shows the possible different amount of yellow paint and blue paint, in quartz, that can be mixed to obtain a shade of green paint.

On the graph, at the point with the coordinates pair of (2, 10), it means for we would require 2 quartz of blue paints to be mixed with every 10 quartz of yellow paint in order to get the shade of the green paint that we are looking for.

3 0
3 years ago
Represent the following expressions as a power of the number a (a≠0)((a^2)^−2)^5÷(a^4a)^3
nikklg [1K]

Answer:

a⁻³⁵

Step-by-step explanation:

((a²)⁻²)⁵ ÷ (a⁴a)³

((a²)⁻²)⁵ ÷ (a⁴a¹)³

= (a⁻⁴)⁵ ÷ (a⁵)³

= a⁻²⁰ ÷ a¹⁵

= a⁻²⁰⁻¹⁵

= a⁻³⁵

Exponent rules:

Multiplying two numbers with same base: add exponents

Dividing two numbers with same base: subtract exponents

Number with exponent raised to another exponent: multiply the exponents together

4 0
3 years ago
Will mark brainliest if answered fast enough
vekshin1

Answer:

Option D that is y=-2(x+1) is the correct choice.

Explanation:

Given equation:

y=2x-2

We have to find another equation which has only one solution.

Standard form of equation:

1.a_1x+b_1y+c_1=0

2.a_2x+b_2y+c_2=0

Condition for one solution.

\frac{a_1}{a_2} \neq \frac{b_1}{b_2}

We have to arrange other equation in the form of  ax+by+c=0

Mark all the options as a,b,c and d.

a.\ 2x+1-y=0

b.\ 2x-2-y=0

c.\ 2x-4-y=0

d.-2x-2-y=0

Now from the above options we can see that option a,b\ and\ c are not providing the desired result.

So

\frac{a_1}{a_2} \neq \frac{b_1}{b_2} can be obtained from the last option.

As

\frac{a_1}{a_2} \neq \frac{b_1}{b_2} ,\frac{2}{-2} \neq \frac{-1}{-1} ,-1\neq 1

Option D that is y=-2(x+1) is the equation from where we can obtained only one solution.

4 0
2 years ago
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