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Maru [420]
2 years ago
6

Solving Quadratic equations by factoring 2x^2-20x+42

Mathematics
1 answer:
elixir [45]2 years ago
8 0

Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.

x = 7,3

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MEED HELP NOW 70 POINTS! Divide. 2/3÷4/5 28 815 56 88
Lelechka [254]

Hi,

Divide using Copy Dot Flop,

2/3 ÷ 4/5 = 2/3 x 5/4

Multiply,

2 x 5 = 10

3 x 4 = 12

= 10/12

Simplify,

10/12 = 5/6

Answer - 5/6

5 0
3 years ago
Read 2 more answers
Solve the following equations <br>x-1=6/x​
Whitepunk [10]

Answer:

or,x2-x=6

or,x2-x-6=0

or,x2-3x+2x-6=0

or,x(x-3)+2(x-3)=0

or,(x-3)(x+2)=0

so either x=3

or x=-2

3 0
3 years ago
Countering a cost $9.40 per sales tax. After sales tax, it cost $9.87. What is the sales tax rate?
Nady [450]
STEP 1:
find the sales tax (decimal form)

x= sales tax

Cost + (Cost * Sales Tax)= Total
plug in known numbers

$9.40 + ($9.40 * x)= $9.87

9.40 + 9.40x= 9.87
subtract 9.40 from both sides

9.40x= 0.47
divide both sides by 9.40

x= 0.47/9.40

x= 0.05 sales tax decimal form


STEP 2:
find sales tax percentage

= 0.05 * 100
or move decimal to the right two decimal places

= 5% sales tax percent form


ANSWER: The sales tax is 5% (or 0.05 in decimal form)

Hope this helps! :)
6 0
2 years ago
Read 2 more answers
$10,000 is invested at two different rates. $2,500 is invested at 4%, and the rest is invested at 5%. How much interest is earne
worty [1.4K]
I'm assuming this is a yearly interest.

2500*.04=100
7500*.05=375

so that would be $475 earned from interest
3 0
3 years ago
An artist is cutting pieces of ribbon to use in a project. Each piece he cuts measures
skad [1K]

Answer:

the artist cuts off 10 inches of ribbon in total

Step-by-step explanation:

2.5 × 4 = 10

8 0
3 years ago
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