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2 years ago

12

In a mixture of concrete, there are five lb of cement mix for each pound of gravel. if the mixture contains a total of 198 lb o

f these two ingredients, how many pounds of gravel are there?

1 answer:

arsen [322]2 years ago

7 0

There are 39.6 lbs. of gravel.

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The distance d, in centimeters, that a diving board bends below its resting position when you stand at its end is dependent on y

kaheart [24]

Answer:

d(1) = -3 and d(2)= -28

Step-by-step explanation:

Given that the distance d, in centimeters, that a diving board bends below its resting position when you stand at its end is dependent on your distance x, in meters, from the stabilized point

$d(x)=-4x^3+x^2$

For finding out the distances for x=1 and x=2

let us substitute 1 and 2 for x

$d(1) = -4(1^3)+1^2 = -3$

$d(2) = -4(2^3)+2^2 \\= -28$

d(1) = -3 and d(2)= -28

3 0

2 years ago

Jeff is 5 feet tall and casts a shadow 30 inches long. How tall is Marisol if her shadow is 24 inches long?

Westkost [7]

The answer to your problem is that Marisol’s shadow would be 144 feet long

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3 years ago

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Solve the system of linear equations in two variables by elimination or substitution.

taurus [48]

Answer:

( $\frac{1}{2}$ , 0 )

Step-by-step explanation:

Given the 2 equations

4x + 3y = 2 → (1)

2x - 3y = 1 → (2)

Adding (1) and (2) term by term will eliminate the y- term, that is

6x = 3 ( divide both sides by 6 )

x = $\frac{3}{6}$ = $\frac{1}{2}$

Substitute x = $\frac{1}{2}$ into either of the 2 equations and evaluate for y

Substituting into (1)

4( $\frac{1}{2}$ ) + 3y = 2

2 + 3y = 2 ( subtract 2 from both sides )

3y = 0 ⇒ y = 0

Solution is ( $\frac{1}{2}$ , 0 )

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2 years ago

Urgent due for tommorow . will mark brainliest and get 50 pts<br>plz show workings

Vilka [71]

Answer:

Step-by-step explanation:

Sec B

1) 5p⁻³ = 8*5⁻²

p⁻³ = 2³*5⁻²/5

p⁻³ =2³*5⁻³ { 1/a^m = a^-m}

p⁻³ = 5⁻³ /2⁻³ {a^m = 1/a^-m}

p⁻³ = (5/2)⁻³

p= 5/2

2) 4x² = 81

x² = 81/4

x² = 9² /2²

x² =(9/2)²

x = 9/2

3) 9^x/3 =81

9^x/3 = 9^2

Comparing the powers, x/3 = 2

x = 2*3 =6

x = 6

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3 years ago

Cards are drawn with replacement from a standard deck until a king is drawn. does this constitute a binomial experiment? why or

Flura [38]

The correct answer is B) No, because there is not a fixed number of trials.

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2 years ago

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