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4 years ago

Which expression gives the solutions of -5+2x^2=-6x

Mathematics

1 answer:

pashok25 [27]4 years ago

4 0

I hope this helps you

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What description represents the expression 5x -9?

mixer [17]

Answer:

A: 9 is subtracted from the product of 5 and a number.

Step-by-step explanation:

We know this because when a varible is place directly next to a number then the number is being multiplied by an unknow number. So in this equation five is being multiplied by an unknown number and nine is being subtracted from that.

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3 years ago

What is the equation of the line that has a slope of 2 and a y-intercept of -3?

zaharov [31]

Answer:

Step-by-step explanation:

y = (slope)x + (y-intercept)

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3 years ago

Read 2 more answers

Factor 15y2 + 10y − 40.

Vaselesa [24]

see how it do it in the picture and hope it helps you..

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3 years ago

Erin feeds her dog 7/10 cup of food a day . With 3/10 cup canned and the rest dry . She also gives her dog 1 treat a day . How m

gavmur [86]

Answer:

$2\frac{4}{5}\ \ or \ 2.8 \ \ cups$

Step-by-step explanation:

-The total portion fed to the dog is 7/10 cup

Canned-3/10
Dry=7/10-3/10=4/10

-One week has 7 days. we multiply the dry portion per day by the number of days in a week.

$Dry= Total -Canned\\\\=\frac{7}{10}-\frac{3}{10}\\\\=0.40 \ cup\\\\Dry \ per \ Week= Dry/ day\times days\\\\=0.40\times 7\\\\=2\frac{4}{5}\ or\ 2.8 \ cups$

Hence, Erin feed her dog 2 4/5 0r 2.8 cups of dry food

5 0

3 years ago

Exponents!

sweet [91]

We know that:

$x^{a+b}=x^a\cdot x^b$

and:

$(x\cdot y)^a=x^a\cdot y^a$

so:

$3^{x+2}-3^{x}=6^3\cdot3^7\\\\3^x\cdot3^2-3^x=(2\cdot3)^3\cdot3^7\\\\3^x\cdot9-3^x=2^3\cdot3^3\cdot3^7\\\\3^x\cdot9-3^x=8\cdot3^3\cdot3^7\\\\
3^x\cdot9-3^x=8\cdot3^{3+7}\\\\3^x\cdot9-3^x=8\cdot3^{10}\\\\3^x\cdot(9-1)=8\cdot3^{10}\\\\8\cdot3^x=8\cdot3^{10}\quad|:8\\\\3^x=3^{10}\\\\\boxed{x=10}$

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3 years ago