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3 years ago

100 POINTS

Mathematics

2 answers:

dedylja [7]3 years ago

5 0

Y= 2x-3
the slope of the line is 2, and b, the y-intercept, is -3

svet-max [94.6K]3 years ago

4 0

the answer is simple. it is a

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Simplify the following expression. 4(20+12) divided by (4-3)

lara31 [8.8K]

4(20+12)/(4-3) = 4(32)/1 = 128
Use order of operations (PEMDAS) Please Excuse My Dear Aunt Sally, and solve for parantheses, then multiply parentheses and then divide by 1.

7 0

3 years ago

Read 2 more answers

Which pair shows equivalent expressions?2(3x+ 2) = 23 x+1<br> 21ę x+ 2) = x+4<br> 2c 21= x+4)= 2

Ket [755]

Answer:

Option (2)

Step-by-step explanation:

Option (1).

$2(\frac{2}{5}x+2)=2\frac{2}{5}x+1$

$\frac{4x}{5}+4=\frac{12}{5}x+1$

Therefore, both the sides of the expression are not equal.

False.

Option (2).

$2(\frac{2}{5}x+2)=\frac{4}{5}x+4$

$\frac{4x}{5}+4=\frac{4}{5}x+4$

True.

Option (3).

$2(\frac{2}{5}x+4)=\frac{4}{5}x+2$

$\frac{4}{5}x+8=\frac{4}{5}x+2$

False.

Option (4).

$2(\frac{2}{5}x+4)=2\frac{2}{5}x+8$

$\frac{4x}{5}+8=\frac{12}{5}x+8$

Both the sides are not equal.

False.

7 0

3 years ago

Determine whether each ordered pair is a solution of the given linear equation.

Rus_ich [418]

Answer:

(2,1) is the only solution to the linear equation

Step-by-step explanation:

to solve, just plug in the values given into the orignal expression. remember, the answer on the left has to be equal to the answer on the right.

(2,1)

4(2) + 3(1) = 11 --> 8 + 3 = 11 --> 11 = 11 (2,1) is a solution to the linear equation

(6,0)

4(6) + 3(0) = 11 --> 24 + 0 = 11 --> 24 ≠ 11 (6,0) is not a solution to the linear equation

(0,1)

4(0) + 3(1) = 11 --> 0 + 3 = 11 --> 3 ≠ 11 (0,1) is not a solution to the linear equation

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3 years ago

The height h (in feet) of an object t seconds after it is dropped can be modeled by the quadratic equation h = -16t2 + h0, where

Reil [10]

Answer:

The rock will reach to the canyon floor in 3.99 seconds.

Step-by-step explanation:

The height h (in feet) of an object t seconds after it is dropped can be modeled by the quadratic equation

$h=-16t^2+255$

Where, h0 is the initial height of the object.

It can be written as

$h=-16t^2+0t+255$

The height of the object is zero if it will reach to the canyon floor.

$0=-16t^2+0t+255$

Quadratic formula:

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here a=-16, b=0 and c=255.

$t=\frac{-0\pm \sqrt{0^2-4(-16)(255)}}{2(-16)}$

$t=\frac{\pm \sqrt{16320}}{-32}$

$t=\pm 3.99$

Time cannot be negative, therefore the rock will reach to the canyon floor in 3.99 seconds.

3 0

3 years ago

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I don't really get this<br> 4u+8w=−3u+2w

emmainna [20.7K]

Answer:

7u = -6w

Step-by-step explanation:

add 3u to both sides

take 8w away from both sides

3 0

3 years ago