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Vera_Pavlovna [14]
3 years ago
13

Please help please help

Mathematics
1 answer:
Pachacha [2.7K]3 years ago
3 0

Answer:

the answer can be 1.667 or -4

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Does anyone know this
SSSSS [86.1K]

Answer:

a=170

Step-by-step explanation:

180-6=174mil

round to 170.

5 0
3 years ago
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Write 0.634 in scientific notation
Elina [12.6K]
6.34x 10-1 because you take the decimal and put it in between the 6 and the 3 and then you figure out how many times destiny needs to move and if it needs moved to the left it is a negative and since it only does once it’s just -1
7 0
3 years ago
The area of a rectangular piece of cardboard is represented by
Liula [17]

This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.

Area of a rectangle:

The area of rectangle of length l and width w is given by:

A = wl

w(2w + 3) = 9

From this, we get that:

l = 2w + 3, A = 9

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}

x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}

\Delta = b^{2} - 4ac

In this question:

w(2w+3) = 9

2w^2 + 3w - 9 = 0

Thus a quadratic equation with a = 2, b = 3, c = -9

Then

\Delta = 3^2 - 4(2)(-9) = 81

w_{1} = \frac{-3 + \sqrt{81}}{2*2} = 1.5

w_{2} = \frac{-3 - \sqrt{81}}{2*2} = -3

Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.

Another similar problem can be found at brainly.com/question/16995958

5 0
3 years ago
I will give brainliest, Please help on this... Show ur work please and thank you
Elanso [62]

Answer:

n=9

Step-by-step explanation:

-5-4n=-41

+5        +5

---------------

-4n=-36

---------------

-4n/4=-36/-4

---------------

n=9

5 0
3 years ago
A test has 20 question if peter gets 80% correct, how many question did peter miss
AlexFokin [52]

Answer:

16 questions right = 80%

So Peter missed 4 questions.

Hope this helps.

:-)

6 0
3 years ago
Read 2 more answers
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