Solve using foil method (x+9)(x+9)

Mathematics

1 answer:

Fudgin [204]3 years ago

3 0

X^2+9x+9x+81
x^2+18x+81
for factoring it

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Solve for x Show work

Alex777 [14]

Answer:

10x is equal to 100 so 100+6=106

then

Step-by-step explanation:

4x is equal to 8 so 4+18=22

so it's 128

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3 years ago

1.)Each sandwich costs $.02 per cubic inch to make. What is the cost of each sandwich?

kirza4 [7]

Part 1) Each sandwich costs $.02 per cubic inch to make. What is the cost of each sandwich?

volume for cube sandwich is 125 in³
volume for pyramid sandwich is 41.67 in³

cost of each cube sandwich=0.02*125-----> $2.5

cost of each pyramid sandwich=0.02*41.67-----> $0.83

the answers Part 1) are
a) cost of each cube sandwich is $2.5
b) cost of each pyramid sandwich is $0.83

Part 2) If each sandwich sells for $4.00 and Mr. Sammie sells 100 Cube sandwiches and 100 Pyramid Sandwiches, how much profit would Mr. Sammie make?

we know that
Profit=Sells-Costs

step 1
find the sells
Sells=200*$4-----> $800

step 2
find the costs
Costs=100*$2.5+100*$0.83----> $333

step 3
find the profit
Profit=Sells-Costs
Profit=$800-$333-----> $467

the answer Part 2) is
the profit is $467

7 0

3 years ago

Which of the following equations is an example of inverse variation between variables x and y ?

Mademuasel [1]

The option C) y = 15/x

a) y = 15 x is an example of direct variation, with proportionality constant = 15

b) is an example of linear variation (it is the equation of a straight line that does not pass through the origin)

c) y = 15/x => y*x = 15 = constant which is the characteristic of an inverse relation

d) y = x/15 is an example of an inverse relation, with proportion constant = 1/15

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3 years ago

Read 2 more answers

(4x^2+3x −5)+(x^2 −7x+10)

olga nikolaevna [1]

Answer:

$5x^{2} -4x +5$