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3 years ago

A room is 12 feet wide. A scale model of the room has a scale of 1 in = 6 ft. What is the width

Mathematics

1 answer:

svetlana [45]3 years ago

6 0

The answer is D because if the scale length is if 1 in is 6 ft and if there is 12ft it has to be D bc 2 in is 12 ft

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13....................

Mashcka [7]

13.

(a)

$y=-5x^2+21x-3$

for x = 2:

$y=-5(2)^2+21(2)-3=-20+42-3=19$

for x = 5

$y=-5(5)^2+21(5)-3=-125+105-3=-23$

(b)

The graph is:

(c)

Using the graph:

$\begin{gathered} x=1.8,y=18.6 \\ x=0.548,y=7 \\ x=3.65,y=7 \end{gathered}$ $\begin{gathered} x=1.8 \\ y=-5(1.8)^2+21(1.8)-3=-16.2+37.8-3=18.6 \end{gathered}$ $\begin{gathered} y=7 \\ -5x^2+21x-3=7 \\ -5x^2+21x-10=0 \end{gathered}$

Using the quadratic formula:

$\begin{gathered} x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ x=\frac{-21\pm\sqrt[]{21^2-4(-5)(-10)}}{2(-5)} \\ x=\frac{-21\pm\sqrt[]{241}}{-10} \\ x=0.54758 \\ or \\ x=3.6524 \end{gathered}$

6 0

9 months ago

Which points are reflections of each other across both the y-axis

ser-zykov [4K]

Answer:

Reflect over the y-axis

Step-by-step explanation:

When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed).

Notice that B is 5 horizontal units to the right of the y-axis, and B' is 5 horizontal units to the left of the y-axis.

The reflection of the point (x,y) across

the y-axis is the point (-x,y).

7 0

3 years ago

Write an equation in slope-intercept form for the line that goes through points (1.4,0) and (1.-2). y= x +

Scorpion4ik [409]

Answer:

x+[1+4+0]and {1×2}

Step-by-step explanation:

can you mark me brainlist

6 0

2 years ago

Stir-fry is tony's favorite food to cook, but it always makes a lot of smoke! Tony needs to know the volume of his kitchen so he

konstantin123 [22]

Answer:

Volume = 680 ft³

Step-by-step explanation:

Given

Floor Area = 85 ft²

Height = 8 ft

Required

Volume of the Kitchen

To solve this, it'll be assumed that Tony's kitchen has a regular shape.

Having said that, the volume of Tony's kitchen is calculated as thus.

Volume = Floor Area * Height.

Substitute the values of floor area and height

Volume = 85ft² * 8ft

Volume = 680 ft³

Hence, the volume of Tony's kitchen is 680ft³

4 0

2 years ago

A reflection maps the point (2, 3) to the point (2, -3).

Tresset [83]

Answer:

x axis

Step-by-step explanation:

We know the x value stays the same. If you were to graph the line y=3 and y=-3, you would see that it is a reflection over the x axis.

3 0

2 years ago