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2 years ago

8

how many grams of a 15 percent alcohol solution should be mixed with 40 grams of a 30 percent solution to obtain a solution that

is 25 percent alcohol

1 answer:

quester [9]2 years ago

8 0

According to my calculations it should be 77

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6. A piece of cardboard is cut in an L-shape as

andrey2020 [161]

Answer: a= 120

Step-by-step explanation:A = height times width, 10 times 12 is 120 :)

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2 years ago

Carry out the indicated operations and simplify where possible:

zzz [600]

Answer:

1/8

Step-by-step explanation:

<u>Solving in steps:</u>

x(8x - 8y)⁻¹ + y(8y - 8x)⁻¹ =
x/8(x-y) +y/8*(-(x-y))
x/8(x-y) - y/8(x-y) =
(x -y)/8(x-y) =
1/8

Answer is 1/8

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3 years ago

Graph a line with a slope of 3/4<br> that contains the point (2, -3)

natita [175]

Step-by-step explanation:

$\frac{y}{x} =\frac{rise}{run} \\\frac{-3}{2} + \frac{3}{4} =\frac{0}{6} =(6,0)=(2,-3)$

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2 years ago

A certain tennis player makes a successful first serve 70% of the time. Assume that each serve is independent of the others. If

EleoNora [17]

this is a binomial problem: p = 0.7 and q = 0.3

a) (0.7)^6

b) (6C4)(0.7)^4(0.3)^2

c) Pr ( at least 4) = Pr(4) + Pr(5) + Pr(6) = (6C5)(0.7)^5(0.3) + (0.7)^6

d) Pr (no more than 4) = 1 - Pr(at least 4) = 1 - (answer from c)

6 0

3 years ago

Use the drop down menus to describe the relationship between the number of teaspoons and number of tablespoon

Keith_Richards [23]

Answer:

From the given picture we can see that , 3 teaspoons = 1 table spoon.....(1)

or 3t=b..(2)

6 teaspoon= 2 tablespoon or 6t=2b

9 teaspoon= 3 table spoon or 9t=3b

Therefore the ratio of teaspoon to tablespoon t:b= 3:1...........(from (1))

Now, 1 tea spoon= $\frac{1}{3}\ tablespoon$ ..............[divide 3 on both sides of (1)]

or $t=\frac{1}{3}b$

The equation to show the relation between teaspoons and table spoon is given by (2)

3t=b

6 0

2 years ago

Read 2 more answers