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3 years ago

I need help asap. I will give 15 points to who ever helps me with The problem is down below

Mathematics

1 answer:

Sindrei [870]3 years ago

4 0

Answer:

Choice D. Total surface area = 8 + 8 + 4 + 4 + 2 + 2

Step-by-step explanation:

You want surface area of this rectangular prism

If you notice there are 6 faces of this prism

two faces with area 1*2 = 2

two faces with area 4*1 = 4

two faces with area 4*2 = 8

Total surface area = 8 + 8 + 4 + 4 + 2 + 2

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The quotient of-54 and 9, subtracted from 8 times a number, is-18

AysviL [449]

The number is: " -3 " .
_____________________________________
Explanation:
_____________________________________
Let "x" be the "unknown number" for which we are to solve.

8x − (-54/9) = -18 ; Solve for "x" ;

→ 8x − (-6) = - 18 ;

→ 8x + 6 = - 18 ;

Subtract "6" from each side of the equation:

→ 8x + 6 − 6 = - 18 − 6 ;

to get: 8x = -24 ;

Divide EACH SIDE of the equation by "8" ; to isolate "x" on one side of the equation ; & to solve for "x" ;

8x / 8 = -24 / 8 ;

to get: x = -3 .
________________________________
The number is: " -3 " .
________________________________

4 0

2 years ago

3. Penny's family decided to go to the Splash Park.

Anestetic [448]

Answer:

21.25

Step-by-step explanation:

because 85$ divided by the 4 tickets is 21.25

6 0

3 years ago

How many ways can you arrange pies on a table in a rectangular array

otez555 [7]

4*5,2*12,in any even number way

4 0

3 years ago

Suppose that y = k * (x - 1/3) ^ 2 is a parabola in the xy -plane that passes through the point (2/3, 1) :Find k and the length

Dennis_Churaev [7]

Answer:

k = 9

length of chord = 2/3

Step-by-step explanation:

Equation of parabola: $y=k (x-\frac13)^2$

Part 1

If the curve passes through point $(\frac23 ,1)$ , this means that when $x=\dfrac23$ , $y = 1$

Substitute these values into the equation and solve for $k$ :

$\implies 1=k \left(\dfrac23-\dfrac13\right)^2$

$\implies 1=k \left(\dfrac13 \right)^2$

Apply the exponent rule $\left(\dfrac{a}{b} \right)^c=\dfrac{a^c}{b^c}$ :

$\implies 1=k \left(\dfrac{1^2}{3^2} \right)$

$\implies 1=\dfrac{1}{9}k$

$\implies k=9$

Part 2

The chord of a parabola is a line segment whose endpoints are points on the parabola.

We are told that one end of the chord is at $(\frac23 ,1)$ and that the chord is horizontal. Therefore, the y-coordinate of the other end of the chord will also be 1. Substitute y = 1 into the equation for the parabola and solve for x:

$\implies 1=9 \left(x-\dfrac13 \right)^2$