aliviafeidlerAlivia
12.08.2020 •
Mathematics
I help! solve 12x^2+54x=-42
Solved
Show answers
More tips
- L Leisure and Entertainment How Many Seasons are There in the TV Show Interns?...
- S Sport When will the Biathlon World Championships 2011 take place in Khanty-Mansiysk? Answers to frequently asked questions...
- H Health and Medicine Trading Semen for Money: Where Can You Sell and Why Would You Want to?...
- F Food and Cooking Homemade French Fries: The Ultimate Guide...
- H Health and Medicine How to Increase Blood Pressure without Medication?...
- S Style and Beauty Choosing a Hair Straightener: Specific Criteria to Consider...
- F Food and Cooking How to Make Polendwitsa at Home?...
- S Science and Technology When do we change our clocks?...
- L Leisure and Entertainment What to Give a Girl on March 8?...
- F Family and Home Is it Worth Knowing the Gender of Your Child Before Birth?...
Answers on questions: Mathematics
- M Mathematics 6. Caleb puts $120 per month into a savings account for his college expenses. He already has $1,505 in the account, About how many more months will it take him...
- M Mathematics Last week, Ms. Rasberry purchased a 3.5 pound of grapes for $2.80. This week she paid $5.25 for a 5-pound package of grapes. What was the difference in the unit...
- M Mathematics Geometry shapes can be scaled and tranformed in any quadrant.. A-true, B-fasle, C- Shapes can be scaled up or down in quadrant 1...
- M Mathematics Triangle ABC has vertices A(0, 0), B(12,7), and C(12, 0). If circle Ois circumscribed around the triangle, what are the coordinates of the center of the circle?...
- M Mathematics Show work thank youu...
- M Mathematics A triangle with a base of 6 cm and a height of 10 cm is dilated by a factor of 2.5. The area of the dilated figure is ___ square cm....
- M Mathematics Sofia says that 1/3⋅1/3⋅1/3⋅1/3=4/3...
- M Mathematics Select the correct answer. If f() x 글 - and g(x) = 2 r 3 c2 x, find AX) - g(x). OA. 2. -2x3 - 2x -2x3 - 2x OB. OC. 2x3 - 2x + 2x D. 2x3 + 2x2...
- M Mathematics Determine whether the relation is a function. Explain. help step by step explanation...
- M Mathematics What is the ordered pair for point B? B Х...
Ответ:
Hi!
Let's solve your equation step-by-step.
12x^2 + 54x = −42
Step 1: Subtract -42 from both sides.
12x^2 + 54x − (−42) = − 42 − (−42)
12x^2 + 54x + 42 = 0
Step 2: Factor left side of equation.
6(2x + 7)(x + 1) = 0
Step 3: Set factors equal to 0.
2x + 7 = 0 or x + 1 = 0
You have two answers.
x = −7/2 or x = −1
Hope this helps!
Ответ:
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 and if josie is second oldest then see
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
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