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Slav-nsk [51]
3 years ago
5

Expand (2x-3y+3)^2 PLEASE HELP!!

Mathematics
2 answers:
Anon25 [30]3 years ago
3 0

Answer:

4x² + 9y² + 12x - 18y - 12xy + 9

Step-by-step explanation:

Given

(2x - 3y + 3)² = (2x - 3y + 3)(2x - 3y + 3)

Each term in the second factor is multiplied by each term in the first factor, that is

2x(2x - 3y + 3) - 3y(2x - 3y + 3) + 3(2x - 3y + 3)

Distribute the 3 parenthesis

= 4x² - 6xy + 6x - 6xy + 9y² - 9y + 6x - 9y + 9 ← collect like terms

= 4x² + 9y² + 12x - 18y - 12xy + 9

love history [14]3 years ago
3 0

Answer:

Step-by-step explanation:

(x+ y + z)² = x² +y² + z² + 2xy +2yz + 2zx

Here, x = 2x   ; y = -3y  & z = 3

(2x - 3y + 3)² = (2x)² + (-3y)² + 3² + 2(2x)(-3y) + 2(-3y)3 + 2*3*(2x)

                    = 4x² + 9y² + 9  - 12xy - 18y + 12x

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Find the original price sales price 40$ percent of discount 25%
svetoff [14.1K]

Answer:$160

Step-by-step explanation:

(100*40)/25= $160

7 0
3 years ago
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Express the following in exponential notation:<br> (-13) X (-13).<br> 35 times
miv72 [106K]

Answer:

(-13) * (-13) = (-13)^{2}

35 * 35 = 35^{2}

Step-by-step explanation:

Given

(-13) * (-13)

Required

Express as an exponential notation

(-13) * (-13)

Apply the following law of indices

x^a * x^b = x^{a+b}

This gives:

(-13) * (-13) = (-13)^{1+1}

(-13) * (-13) = (-13)^{2}

<em>The second complete is incomplete; However, I'll assume it is: 35 times 35</em>

35 * 35

Using the same law applied in (1) above:

35 * 35 = 35^{1+1}

35 * 35 = 35^{2}

8 0
3 years ago
Slopes, y-intercepts, (&amp; points)
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y = 3.95(x) + 10

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8 0
3 years ago
Five siblings have a combined age of 195 years. The oldest is 13 years older than the youngest Marc the middle child Anne is fiv
lidiya [134]
This is what someone else answered when someone else asked it. I can't explain it better than this.





So five sibbllings ages are repressented as
a,b,c,d,e
let's have a as youngest and e as oldest in that order
total ages are 195 so
a+b+c+d+e=195
oldest is 13 older thatn youngest
e=13+a
middle child anne (c) is 5 years younger than josie who is an unknow position, we know that she could be d or e or oldest or second oldest
the other 2 are 6 years appart
b and d ar e 6 years appart or b and e are 6 years apart? or is josie the oldest, or second oldest?

second oldes is 42 so
d=42

2 scenarios
if josie is oldest, then see AAAA and if josie is second oldest then see BBBB

AAAA
josie is 13 years older than mark
e=13+a
anne is 5 less than josie
c=e-5
the other 2 are 6 years apart
b+6=d
d=42
subsitute and get
b=36
add and get
78+a+c+e=195
a+c+e=117
e-13+e-5+e=117
3e-18=117
add 18 to both sides
3e=135
divided both sides by 3
e=45
subsitute
a=32
b=36
c=40
d=42
e=45


BBBB
oldest is 13 older than youngest
e=13+a
middle is 5 younger than josie (d)
c=d-5
the other 2 are 6 apart
b=e-6
d=42
subsitute
c=37
subsitute
a+b+37+42+e=195
a+b+e+79=195
subtract 79 from both sides
a+b+e=116
subsitute
e-13+e-6+e=116
3e-19=116
add 19 to both sides
3e=135
divide both sides by 3
e=45
subsitute
45-6=39=b
45-13=32=a
c=42-5=37
this is wrong because b cannot be older than c so therefor AAA si the correct answer


THE ANSWER IS
Josie is the oldest=45
Unknown is second oldest=42
Anne is middle=40
Unknown2 is second youngest=36
Mark is the youngest=32
5 0
3 years ago
-7.5÷4.25<br><br><br>Awnser:<br><br><br>Explain:​
Lana71 [14]

Answer:

the answer is 1.76 I believe

7 0
3 years ago
Read 2 more answers
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