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3 years ago

Can someone please give me the area to this. Yes I know a=B*H but I just need the answer to this

Mathematics

1 answer:

seraphim [82]3 years ago

3 0

It is actualy A = w * l

so

A = 264

then we minus 30 which equals both areas of the triangles combined, so the final answer is...... 234

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A team of scientists are conducting research on the effect of word fonts used in road signs on accident rates. Across the popula

REY [17]

Answer:

Step-by-step explanation:

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8 0

2 years ago

A scientist has a container of 2% acid solution and a container of 5% acid solution. How many fluid ounces of each concentration

algol [13]

Let 'a' be the number of ounces of 2%-solution in the 25-ounce mixture

and 'b' be the number of ounces of 5%-solution in the 25-ounce mixture.

Since, fluid ounces of each concentration should be combined to make 25 fl oz.

So, a+b=25 (Equation 1)

And, a container of 2% acid solution and a container of 5% acid solution should be combined to make 25 fl oz of 3.2% acid solution.

So, a of 2% + b of 5% = 3.2% of 25

$(a \times \frac{2}{100})+(b \times \frac{5}{100})= 25 \times \frac{3.2}{100}$

$(0.02a)+(0.05b)= 0.8$

Multiplying the above equation by 100, we get

$2a+5b=80$ (Equation 2)

Substituting the value of a=25-b in equation 2, we get

$2(25-b)+5b=80$

$50-2b+5b=80$

$50+3b=80$

$3b=30$

$b=10$

Since, a=25-b

a= 25-10

a=15.

So, 15 fluid ounces of 2% solution combined with 10 ounces of the 5% solution to create a 25-ounce mixture at 3.2% concentration of acid.

7 0

2 years ago

Suppose U = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} is the universal set and Q = {3, 6, 9). What is Q"?

mario62 [17]

Answer:

$\{3, 6, 9\}$

Step-by-step explanation:

U is the universal set, that is, a set that contains the universe of possible sets, which is formed by 10 elements in this. Q is a subset of U formed by three elements: 3, 6, 9. ( $Q \subseteq U$ )

$Q''$ represents the complement of the complement of $Q$ . The complement of $Q$ is the subset of $U$ formed by elements not contained in $Q$ . which simbolized by $Q'$ . That is, 1, 2, 4, 5, 7, 8, 10.