Lorrie

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 diamond after the first card has been replaced into the deck, what is the probability of A and B.

14 years ago

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. Solve with quadratic equation?

11 years ago

Two whole numbers add to 17 and the sum of their squares is 185. What are the numbers

11 years ago

A rectangle has a perimeter of 23cm. Its area is 33 cm*2. Determine the dimensions of the rectangle.

11 years ago

A rectangle garden measures 15m by 24m. A larger garden is to be made by increasing each side by the same amount. The resulting area is to be 1.5 times the original area. Find the dimensions of the new garden to the nearest tenth of a metre.

11 years ago

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 horizontal distance in feet. At what height is the ball released? What was the maximum height the ball reached? The centre of the...

11 years ago

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 triangle?

11 years ago

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 height in metres and t is the time in seconds. How tall is the building? What is the maximum height that the rocket will reach?...

11 years ago

At a park, a landscaper wishes to plant a uniform border of tulips around the outside of a 18m by 12m rectangular garden. The garden will look best if the area of the tulip border is half the area of the garden. How wide should the border be?

11 years ago

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 the width of the deck?

11 years ago

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 with a mast of 28m above the water pass under the bridge 8m from the middle of the bridge?

11 years ago

7(6-x2) = x2-1

17 years ago

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!

11 years ago

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?

11 years ago

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

11 years ago

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??

11 years ago

(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??

11 years ago

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?

11 years ago

Is the answer I gave correct?

11 years ago

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

11 years ago

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 e...

11 years ago

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?

11 years ago

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...

11 years ago

please reply

11 years ago

Are the first 2 parts correct? Hint please on the third part? I think I need the velocity? How to calculate?

11 years ago

Guidance as to where I am going wrong?

11 years ago

Is this right?

11 years ago

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

11 years ago

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 rectang...

11 years ago

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 f...

11 years ago