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Lorrie
Questions (11)
The underside of a bridge has a shape of a parabolic arch. It has a maximum height of 30m and a width of 50m. Can a sailboat
3 answers
1,786 views
A 10m by 20m pool is to be surrounded by a deck of uniform width. The area of the deck is twice the area of the pool, what is
4 answers
1,671 views
At a park, a landscaper wishes to plant a uniform border of tulips around the outside of a 18m by 12m rectangular garden. The
2 answers
1,004 views
A model rocket is launched from a roof of a building. Its path is described by the relationship h=-5t*2+35t+10, where h is the
2 answers
1,004 views
The altitude of a triangle is 2cm longer than its base. The area of the triangle is 60 cm*2. What are the dimensions of the
2 answers
766 views
The path of a basketball foul shot is modelled by the relation h=-0.44d*2+4.4d+7, where h is the height in feet and d is the
1 answer
606 views
A rectangle garden measures 15m by 24m. A larger garden is to be made by increasing each side by the same amount. The resulting
6 answers
4,127 views
A rectangle has a perimeter of 23cm.
Its area is 33 cm*2. Determine the dimensions of the rectangle.
5 answers
5,055 views
Two whole numbers add to 17 and the sum of their squares is 185. What are the numbers
4 answers
665 views
Two numbers add to 18. If you square the larger number and add 6 times the smaller number you get 163. What are the numbers.
1 answer
497 views
Event A represents the act of drawing a rank of eight from a standard deck of 52 cards, if B represents the event of drawing any
1 answer
611 views
Answers (19)
I tried this question two ways, (10x+2x)(20x+2x)-did quadratic equation instead of factoring & got incorrect answer so I did (10+x)(20+x)with quadratic equation & got 5 or -20, chose 5 & sub'ed into area to check but when typing in here I typed the 4x^2
2nd answer: P=2x +2y=23 x+y=11.5 y=11.5-x x(11.5-x)= 33 11.5x -x^2=33 (Multiply by 2 to get rid of decimal?) 23x-2x^2=66 23x-2x^2+66=0 (x-6)(2x-11)=0 Sub 6 into y= 11.5-x=11.5-6=5.5 Sub 5.5, 5.5=11.5-x, x=11.5-5.5=6 Therefore the dimensions of the
Sorry Ms. Sue, I have posted hopefully correct or on the right track answers to all the other questions, but I have to go to sleep, I will attempt to answer this tomorrow Thanks
Is this right?
Guidance as to where I am going wrong?
Are the first 2 parts correct? Hint please on the third part? I think I need the velocity? How to calculate?
please reply
Pool A=10 x 20 = 200 Deck A=200(2)=400 Total Area=400+200=600 (10+x)(20+x)=600 200+10x+20x+4x^2=600 4x^2+30x-400=0 did quadratic equation, got 10 or -20 Added 10 to length & width 20 x 30 =600, which is the total area. Therefore the deck is 20 x 30, would
Redid the quadratic equation, got 4.16 or -43.16 Rounded 4.16 to 4.2 Sub'ed into dimensions 15+4.2=19.2 & 24+4.2=28.2 19.2 x 28.2 =541.44, close to 540 IS THIS CORRECT?
no I did not know I had to show my work,I did not read the posting tips, I have posted most of my work to show where I was stuck. I did not expect to have my homework just done for me as that would be useless when it came time to write the test or final
P=2(18)+ 2(12)= 36 +24+ 60 A+18x12=216 Tulip border= 216/2=108 (18+x)(12+x)=(18x12)/2 +216 216+18x+12x+x^2=108+216 x^2+30x-108=0 cannot factor quadratic equation = -40.82 or -20.82
Is the answer I gave correct?
The building is 10 metres tall. h=-5t^2+35t+10 =-5(t^2-7t-2) =-5(t^2-7t+12.25-12.25)+10 =-5(t^2-7t+12.25)+61.25+10 = -5(t^2-7t+12.25)+71.25 =-5(t-3.5)^2 + 71.25 So at 3.5 seconds the maximum height is 71.25 metres high. Is this correct?
(15+x)(24+x)= (15*24)(1.5) 360+15x+24x+x^2=540 x^2+39x-180=0 cannot factor? tried quadratic equation, got x=+/-15.33??
A=15 x 24=360 existing garden A=360 x 1.5=540 W=15+2x L= 24+2x (15+2x)(24+2x)= 540 4x*2+78x-180=0 x=-78+or- square root of 78*2-4(4)(-180)/2(4) =-78+or - sq root 6084 +2880/8 =89 or 66 OR 540=15(1.5)x 24(1.5) = 22.5 x 36=810 not correct??
Area= 1/2 x b x h h = b +2 = 1/2 x b x b +2 60= 1/2 x b x b + 2 120=b x b + 2 118= 2b 59=b h=59 + 2 =61
2L + 2W = 23 L= 11.5 - w Area=33=l(w) =(11.5-w)(w) =11.5w - w*2 h=-11.5/2(1) =5.75 L=11.5-5.75=5.75 Dimensions are 5.75m by 5.75m So this would make it a square?
Erik your wrong again. If arteries go away from the heart then why would this go away to? The answer is Towards the heart. Look it up better. A website called SEER.Look it up!
7(6-x2) = x2-1
