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Wittaler [7]
3 years ago
8

1. 3x + 5 = 5x -9

Mathematics
2 answers:
Julli [10]3 years ago
6 0

Answer:

1)7

2)8

3)9

Step-by-step explanation:

1)3x+5=5x-9

3x-5x=-9-5

-2x=-14

x=7

2)2x+5=3x-3

2x-3x=-3-5

-1x=-8

x=8

3)3x+2=5x-16

3x-5x=-16-2

-2x=-18

x=9

Hope I am correct and if I am not I will edit my answer

lorasvet [3.4K]3 years ago
6 0

Answer:

1. x= 7

2. x= 8

3. x= 9

Step-by-step explanation:

1. 3x+5= 5x-9       2. 2x+5= 3x-3       3. 3x+2 = 5x-16

3x-5x= -9-5           2x-3x = -3-5           3x-5x = -16-2

-2x= -14                         -x = -8               -2x = -18

x= -14/-2                           x = -8/-1              x = -18/-2

x = 7                                       x = 8                   x = 9

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5 0
3 years ago
Which golf ball went higher, and how many feet? (Desmos!) - Just added the answer choices!
lora16 [44]

Answer:

Max height: 64 feet, and the socond one was higher.

Step-by-step explanation:

The max height is the y value of the vertex, because that’s when the graph peaks.

we can already very clearly see the vertex on the graph, so we don’t need to calculate it.

the max height of the second golf ball is 64 feet.

Now let’s look at the max height on the first golf ball.

we get the equation

h=-16t squared + 48t

to find the vertex of this, we can use the formula -b/2a

-48/-32 = 1.5

1.5 is the t value of this vertex.

to find the h value, we plug it in.

h = -16 (1.5) squared + 48(1.5)

h =2.25 times -16 + 72

h = -36 +72

h = 36

the first one is 36 max height, and the second is 64. The second one is bigger.

8 0
3 years ago
Colby wants to set square tiles on the top of a wooden box. The top of the box is a rectangle7 1/2 inches long and 5 1/2 inches
Nostrana [21]
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4 0
3 years ago
Read 2 more answers
HELP QUICKLY PLSSS!!!!!!!!!!<br><br> Evaluate square root -75s where s = -3
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Answer:

15

Step-by-step explanation:

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3 0
3 years ago
I need help understanding this ASAP plz, I have a quiz over this next week!!!!
scZoUnD [109]

Answer:

Step-by-step explanation:

With any two points, you can find the line between them with:

y = mx + b\\where\\m = \frac{y_2-y_1}{x_2-x_1}

#1:

(-1, 1) -> (1, 3) m = \frac{3-1}{1-(-1)} = 1, 3 = 1(1) + b, b = 2, y = x + 2

(3, 4) -> (0, 2) m = \frac{4-2}{3-0} = \frac{2}{3}, 2 = \frac{2}{3}(0) + b, y = \frac{2}{3}(x)+2

(0, 1) -> (3, 3) m = \frac{3-1}{3-0} = \frac{2}{3}, 1 = 2/3(0) + b, y = \frac{2}{3}(x) + 1

Lines b and c are parallel because they have the same slopes

#2 is a bit easier

a: 2y = x + 12, y = \frac{1}{2}(x) + 6

b:2y - x = 5, y = \frac{1}{2}(x) + \frac{5}{2}

c: 2y + x = 4, y = \frac{-1}{2}(x) + 2

Since lines a and b have the same slope, they are parallel

#3:

(1, 3), y = 2x - 5

We have to find a line with a slope of 2 that passes through the two points

y = 2x + b\\3 = 2(1) + b\\b = 1\\\\y = 2x + 1

#4:

(-2, 1) , y = -4x + 3

We have to find a line with a slope of-4 that passes through the line

y = -4x + b\\1 = -4(-2) + b\\1 = 8+ b\\b = -7\\y = -4x - 7

#5:

(-2, 3) (1, -1), m = \frac{3-(-1)}{-2-1} = \frac{-4}{3}, 3 = \frac{8}{3} + b, b = \frac{1}{3}, y = \frac{-4x}{3} + \frac{1}{3}

(-3, 1) (1, 4), m = \frac{4-1}{1-(-3)} =\frac{3}{4}, 4 = \frac{3(1)}{4} + b, y = \frac{3}{4}(x) + \frac{13}{4}

(0, 2) (3, -2) m = \frac{2-(-2)}{0-3} = \frac{-4}{3} , 2 = b, y = \frac{-4}{3}(x) + 2

Since lines c and b have negative reciprocal slopes, they are perpendicular

#6:

a: y = -4x + 7

b: x = 4y + 2, y = \frac{x}{4} - \frac{1}{2}

c: -4y + x = 3, y = \frac{x}{4} - \frac{3}{4}

since lines a and c have negative reciprocal slopes, they are perpendicular

6 0
3 years ago
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