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Kigarya
01.11.2019 •
Mathematics
Subtract (enter answer is standard form)
(-2x^4-2x^3+8x^2+-5x^3+2x+7)
which graph represents the inequality? (has picture)
2x-3y≤6
multiply
8y^4(2y^4-3y^3+5y)
solve for x
0=7x^2+x+5
harold and helen both spend 3 hours reading a novel. helen reads 30 more pages than harold. helen reads at least 40 pages in 1 hour, but no more than 70 pages in 1 hour.
which statement correctly describes the range of pages harold reads?
harold reads more than 90 pages, but less than 180 pages.
harold reads at least 90 pages, but no more than 180 pages.
harold reads more than 150 pages, but less than 240 pages.
harold reads at least 150 pages, but no more than 240 pages.
pb& p sells peanut butter and pickle sandwiches. the standard special sells for $2 and the deluxe special sells for $4.50. when all related business expenses are included, the standard special costs $0.50 to prepare and the deluxe special costs $1.25 to prepare.
last monday, pb& p sold at least $200 worth of standard and deluxe peanut butter and pickle sandwich specials and its expenses were no more than $100. at least 30 standard special were sold.
let x be the number of standard specials sold last monday and y be the number of deluxe specials sold last monday.
which ordered pairs representing a combination of standard specials and deluxe specials could have been sold last monday and make sense in the context of the situation?
select each correct answer.
(30,68)(30,68)
(80,40.5)(80,40.5)
(60,70)(60,70)
(40,60)(40,60)
(50.5,40)
effie is selling candles to raise money for new soccer league equipment. a small candle sells for $8 and a large candle sells for $12. the number of large candles effie sells must be greater than or equal to 2 times the number of small candles she sells. she has at most 48 candles to sell.
the number of small candles sold is represented by x and the number of large candles sold is represented by y.
what is the maximum revenue she can make?
$448
$512
$576
$588
what is the product of 4−5i and 2+3i?
enter your answer, in standard form, in the box.
Solved
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Ответ:
Part 1)![-3x^4+3x^3+8x^2-2x-5](/tpl/images/0355/7922/f3fbb.png)
Part 2) The graph in the attached figure
Part 3)![16y^8-24y^7+40y^5](/tpl/images/0355/7922/2d58d.png)
Part 4)
and ![x2=\frac{-1-\sqrt{139}i} {14}](/tpl/images/0355/7922/aa2ff.png)
Part 5) Harold reads more than
pages, but less than
page
Part 6)
, ![(40,60)](/tpl/images/0355/7922/8daba.png)
Part 7)![\$576](/tpl/images/0355/7922/2d73f.png)
Part 8)![23 + 2i](/tpl/images/0355/7922/07b8c.png)
Step-by-step explanation:
The complete answers in the attached figure because is too long
Part 1) Subtract (enter answer is standard form)
we have
Eliminate parenthesis
Combine like terms
Part 2) Which graph represents the inequality?
we have
Rewrite the inequality ------>![3y\geq2x-6](/tpl/images/0355/7922/61ac0.png)
the solution is the shaded area above the solid line
the equation of the line is equal to![3y=2x-6](/tpl/images/0355/7922/3a2d5.png)
the slope of the line is positive
the y-intercept of the line is the point
---> value of y when the value of x is equal to zero
the x-intercept of the line is the point
---> value of x when the value of y is equal to zero
The solution in the attached figure
Part 3) Multiply
we have
Part 4) Solve for x
we have
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
so
substitute in the formula
remember that
so
Part 5) Harold and Helen both spend
hours reading a novel. Helen reads
more pages than Harold. Helen reads at least
pages in
hour, but no more than
pages in
hour.
Which statement correctly describes the range of pages Harold reads?
Let
x------> the number of pages that Harold read
y------> the number of pages that Helen read
we know that
so
in three hours ------->
------> inequality B
so
in three hours ------->
------> inequality C
Substitute equation A in the inequality B
Substitute equation A in the inequality C
therefore
Harold reads more than
pages, but less than
page
Part 6) Let
x------> the number of Standard Specials sold last Monday
y------> the number of Deluxe specials sold last Monday
we know that
Remember that
If a ordered pair representing a combination of Standard specials and Deluxe specials could have been sold last Monday and make sense in the context of the situation
then
the ordered pair must satisfy all restrictions
Verify
A)
Substitute the value of x and y in each inequality
Inequality A
Inequality B
Inequality C
The ordered pair
represent a combination of Standard specials and Deluxe specials could have been sold last Monday and make sense in the context of the situation
B)
The value of
not make sense in the context of the situation, because is not a whole number
C)
Substitute the value of x and y in each inequality
Inequality A
Inequality B
therefore
the ordered pair
is not a solution
D)
Substitute the value of x and y in each inequality
Inequality A
Inequality B
Inequality C
The ordered pair
represent a combination of Standard specials and Deluxe specials could have been sold last Monday and make sense in the context of the situation
E)
The value of
not make sense in the context of the situation, because is not a whole number
Ответ:
2
Step-by-step explanation: