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3 years ago

See above. okokokoookkokokokokkkkokokkokokkok

Mathematics

1 answer:

Andrew [12]3 years ago

6 0

Answer:

Step-by-step explanation:

B is the correct answer

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What are the solutions ?<br><img src="https://tex.z-dn.net/?f=7x%20%5E%7B2%7D%20%20%2B%2010x%20-%203%20%3D%20x%20%5E%7B2%7D%20%2

anyanavicka [17]

Answer:

$x = \frac{ - 3}{2} \: or \: \frac{1}{3}$

Step-by-step explanation:

$7 {x}^{2} + 10x - 3 = {x}^{2} + 3x$

$= > 7 {x}^{2} - {x}^{2} + 10x - 3x -3 = 0$

$= > 6 {x}^{2} + 7x - 3 = 0$

$= > 6 {x}^{2} + 9x - 2x - 3 = 0$

$= > 3x(2x + 3) - 1(2x + 3) = 0$

$= > (2x + 3)(3x - 1) = 0$

Here x will have 2 values.

1) $2x + 3 = 0$

$= > 2x = - 3$

$= > x = \frac{ - 3}{2}$

2) $3x - 1 = 0$

$= > 3x = 1$

$= > x = \frac{1}{3}$

4 0

3 years ago

Write an equivalent expression to 9y -1/2(4y+20)

Leya [2.2K]

An equivalent expression could just be one that is simplified. So we get 9y - 2y - 10 if we distribute the 1/2, which is 7y - 10.
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Hope this helps!
==jding713==

6 0

4 years ago

Read 2 more answers

Andrew gives a cashier $40 to buy 3 T-shirts that cost $n each. Which algebraic expression

kumpel [21]

Answer:

1. B (40- 3n)

2.c (86)

Step-by-step explanation:

1. The shirts cost 3n. So you do 40- 3n(what the shirts cost) to find the amount of change he will recive.

2. Just plug the numbers in- 1.8(30) + 32=86.

8 0

3 years ago

Read 2 more answers

Help me please !!!!!!!!!

ANTONII [103]

The answer in b next time make sure the picture is clear

3 0

3 years ago

Renata wins a $20 gift card to an online music site. After Renata purchases 16 songs, the gift card has a remaining

amm1812

Answer: $y=20-1.25x$

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope of the line and "b" is the y-intercept.

You need to analize the information given in the exercise.

You know that gift card had a total of $20. Then, since she started to buy the songs with $20, you can identify that:

$b=20$

Since Renata purchased 16 songs and the gift card had a remaining balance of $0 after this, you can find the cost of each song. This is:

$\frac{20}{16}=\$1.25$

Therefore, she spent $1.25 per song. This means that the slope is:

$m=-1.25$

Then, you get that the equation that represents the relationship between "y" (the remaining balance on Renata's gift card) and "x" (the number of songs purchased) is:

$y=20-1.25x$

7 0

3 years ago