2 years ago

2 lines are not parallel, how many solutions are there

Mathematics

1 answer:

garri49 [273]2 years ago

5 0

Answer:

Either one: the two line have a point in common, or infinite: they are the same line.

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Kelly buys a book for 9.95 michael buys a pair of socks for 7.45.how much more money does kelly spend than michael

Luba_88 [7]

Answer:

$2.50

Step-by-step explanation:

To find this out u must subtract the two totals:

9.95- 7.45= $2.50

Hope this helped

Please mark brainless

So i can rank up ;D

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2 years ago

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Combing like terms -4(7 + 3a) -6a(4a - 5)

lianna [129]

Answer:

-4(7 + 3a) - 6a(4a - 5) = <em><u>−24</u></em> $x^{2}$ <em><u>+18a−28</u></em>

Step-by-step explanation:

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2 years ago

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What is the factored form of x^3 + 125?

Lerok [7]

$x^3+125=x^3+5^3$

Sums of cubes can be factored as

$a^3+b^3=(a+b)(a^2+ab+b^2)$

$x^3+125=(x+5)(x^2+5x+25)$

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3 years ago

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Joe and his family are flying to Texas. Their plane flies 645 miles at 215 mph. How long does the trip take? Solve and explain

olya-2409 [2.1K]

You can use the distance equation.. d = rt
d = distance = 645
r = rate = 215 mph
t = time = ???? find the time
645 = 215t
645/215 = 215t / 215
3 = t
t = 3
It took 3 hours

7 0

3 years ago

Find the product and sum of the roots of the equation:<br> 2x^2-9x-10=0

BabaBlast [244]

Answer:

<h3> sum of the roots: $x_1+x_2=4\frac12$ </h3><h3> product of the roots: $x_1x_2=-5$ </h3><h3> Step-by-step explanation:</h3>

$2x^2-9x-10=0\quad\implies\quad a=2\,,\ b=-9\,,\ c=-10$

$b^2-4ac=(-9)^2-4(2)(-10)=81+80=161>0$

From Vieta's formulas applied to quadratic polynomial we have:

if $b^2-4ac\geqslant0$ then

sum of roots: $x_1+x_2=-\dfrac ba=-\dfrac{-9}2=4\frac12$

product of the roots: $x_1x_2=\dfrac ca=\dfrac{-10}2=-5$

3 0

3 years ago