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Lina20 [59]
3 years ago
13

Steps

Mathematics
1 answer:
slamgirl [31]3 years ago
5 0

Answer:

step 2

Step-by-step explanation:

Given

(2x - 3)(5x² - 2x + 7)

2x(5x² - 2x + 7) = 10x³ - 4x² + 14x ← step 1 is correct

- 3(5x² - 2x + 7) = - 15x² + 6x - 21 ← step 2 in her working is incorrect

Adding the results from step 1 and step 2

10x³ - 4x² + 14x - 15x² + 6x - 21 ← collect like terms

= 10x³ - 19x² + 20x - 21

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A new pencil is 19 centimeters long. Levi uses it for a month. The pencil now measures 8 centimeters.
pogonyaev

Answer:

11 cm

Step-by-step explanation:

Given:

Length of new pencil = 19 cm

Length of pencil after using a month = 8 cm

Question asked:

The pencil is centimeters shorter now than when it was new = ?

Solution:

Length of new pencil = 19 cm

Length of pencil after using a month =  8 cm

The pencil is centimeters shorter now than when it was new = 19 cm -  8 cm

                                                                                                     = 11 cm

Length of pencil has been used during a month = 11 cm

8 0
3 years ago
What is the 10th term in the pattern with the formula 9n + 9?
Studentka2010 [4]
A(10) = <span>9(10) + 9= 90+9 =99

---------------------------------------------</span>
6 0
3 years ago
Read 2 more answers
HELP ILL GIVE BRAINLIEST!!!!
Setler [38]

Its A i had the same one. Hope it helps.

8 0
3 years ago
Would the answer for 36 be $9.88 or $9.75?
ludmilkaskok [199]

total bill before any discounts $13.

she is a student, so she gets 20% off.

she brought an item of clothing, so she gets 5% off.

so she's really getting 20% + 5% off, namely 25% off her bill.

\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{25\% of 13}}{\left( \cfrac{25}{100} \right)13\implies 3.25}~\hfill \stackrel{\textit{bill with all discounts}}{13-3.25\implies 9.75}

6 0
3 years ago
The differential equation dy dx equals the quotient of the quantity x plus 1 and y minus 3
Phantasy [73]

Answer:

I only

Step-by-step explanation:

dy/dx = x + 1 / y -3

(y - 3)dy = (x + 1) dx

integrate

1/2y^2 - 3x = 1/2x^2 + x

1/2y^2 = 1/2x^2 + 4x

y^2 = x^2 + 8x

y = (x^2 + 8x)^1/2

3 0
2 years ago
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