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kati45 [8]
2 years ago
6

Simplify the expression. (1423 – 2x2 + 3x – 7) – (328 + 142 – 10)

Mathematics
1 answer:
Lubov Fominskaja [6]2 years ago
3 0

Answer:

-2x^2+3x+956

Step-by-step explanation:

If you want to do math easier, just look up symbolab.com and it will show you the right answers and how to do the problems.

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Can someone help me please​
pishuonlain [190]

Answer:

Step-by-step explanation:

36+88+y=180

124+y=180

y=180-124

<u>y=56</u>

x+90+56=180

x+146=180

x=180-146

<u>x=34</u>

<u />

<h3><u>If you need to ask any questions, please let me know.</u></h3>
7 0
2 years ago
Let a and b be roots of x² - 4x + 2 = 0. find the value of a/b² +b/a²​
erastovalidia [21]

Answer:

\dfrac{a}{b^2}+\dfrac{b}{a^2}=10

Step-by-step explanation:

Given equation:   x^2-4x+2=0

The roots of the given quadratic equation are the values of x when y=0.

To find the roots, use the quadratic formula:

x=\dfrac{-b \pm \sqrt{b^2-4ac} }{2a}\quad\textsf{when }\:ax^2+bx+c=0

Therefore:

a=1, \quad b=-4, \quad c=2

\begin{aligned}\implies x & =\dfrac{-(-4) \pm \sqrt{(-4)^2-4(1)(2)}}{2(1)}\\& =\dfrac{4 \pm \sqrt{8}}{2}\\& =\dfrac{4 \pm 2\sqrt{2}}{2}\\& =2 \pm \sqrt{2}\end{aligned}

\textsf{Let }a=2+\sqrt{2}

\textsf{Let }b=2-\sqrt{2}

Therefore:

\begin{aligned}\implies \dfrac{a}{b^2}+\dfrac{b}{a^2} & = \dfrac{2+\sqrt{2}}{(2-\sqrt{2})^2}+\dfrac{2-\sqrt{2}}{(2+\sqrt{2})^2}\\\\& = \dfrac{2+\sqrt{2}}{6-4\sqrt{2}}+\dfrac{2-\sqrt{2}}{6+4\sqrt{2}}\\\\& = \dfrac{(2+\sqrt{2})(6+4\sqrt{2})+(2-\sqrt{2})(6-4\sqrt{2})}{(6-4\sqrt{2})(6+4\sqrt{2})}\\\\& = \dfrac{12+8\sqrt{2}+6\sqrt{2}+8+12-8\sqrt{2}-6\sqrt{2}+8}{36+24\sqrt{2}-24\sqrt{2}-32}\\\\& = \dfrac{40}{4}\\\\& = 10\end{aligned}

6 0
1 year ago
Read 2 more answers
A paperback book is shaped like a rectangular prism. The cover of the book measures 5 inches by 8 inches, and the book is 2 inch
mezya [45]
80 inches is the volume
4 0
3 years ago
Read 2 more answers
6.2×0.03= and tell me how you did it please ​
matrenka [14]

Answer:

0.186

Step-by-step explanation:

       6.2

<u>x    0.0</u><u>3</u>

           6

    1

       6.2

<u>x    0.0</u><u>3</u>     since 6*3=18, we have to carry the 1

        86

     1

       6.2

<u>x    0.0</u><u>3</u>

       186

       6.2

<u>x    0.</u><u>0</u><u>3</u>

        186

         0

       6.2

<u>x    0.</u><u>0</u><u>3</u>

       186

       00

       6.2

<u>x    </u><u>0</u><u>.03</u>

       186

       00

      0

       6.2

<u>x    </u><u>0</u><u>.03</u>

        186

+      00            add the partial products

<u>      0</u><u>0                   </u>

     00186

      6.2

<u>x    0.</u><u>03</u><u>     </u>                   count how many digits are after the decimal point      from each factor =3 and place in product

        186

+      00            

<u>      00                   </u>

     00.186=0.186

<em>answer=0.186</em>

8 0
3 years ago
URGENT 10 POINTS BRAINLIEST
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For a the answer is: 48 km/hr. For b the answer is: The distance could be longer, so if she took hours she would have to drive faster; or if starter distance she would have driven slower

3 0
3 years ago
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