3. A rectangle has width 2x and length 2x+4.2x metres
(2x + 4) metres
a) Find an expression for the perimeter of this rectangle.
b) Find the value of x if the perimeter is 240 metres.
c) Find the length and the width.
4.a) Write an expression for the perimeter of the rectangle.
(x - 2) cm
(3x + 4) cm
b) Simplify the expression.
c) What is the perimeter when x = 5?
d) What is the value of x when the perimeter is 60 cm?
e) What are the dimensions of the rectangle when the perimeter is 60 cm?
Answers
b-29
c-w=58 l=62
4a-2(3x+4)+2(x-2)
b-8x+4
c-44
d-7
e-5 and 25
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8.235×10 to the power of -4 scientific notation
PLs HElp pls help will mark brainliest!!!!!!
On a recent day a Euro was equal to about 1.2 American dollars. Write an expression which estimates the number of dollars in x Euros. Then estimate the number of American dollars equal to 25 Euros.
Answers
lets consider width=w
so, length = w+40
area = length*width=6000
(w+40)*w=6000
w^2 +40*w-6000=0;
w^2+(100*w-60*w) -6000=0
(w^2 + 100*w) - (60*w+6000)=0
w(w+100)-60(w+100)=0
(w+100)(w-60)=0
w=60, because width will not be '-100'
w=60 and L=60+40=100
15. y = 2
16, 2x - y = 5
17. y - 1 = =(x + 3)
Answers
Answer:
Step-by-step explanation:
14. x=4
vertical line(no slope) with one coordinate being (4,0)
15. y=2
horizontal line(no slope) with one coordinate being (0,2)
16. 2x-y=5
slope= 2; two coordinates are (0,-5) and (2,-1)
17. y-1=(x+3)
slope= 1; two coordinates are (-4,0) and (0,4)
HOPE THIS HELPS!!! :)
Answers
- = - I hope this helps!
x 100
Answers
Answers
Answer:
90π cm²
Step-by-step explanation:
Given: Radius of circular base= 5 cm
height= 12 cm
Now finding the surface of cone.
Formula; Surface area of cone=
Where; r= radius
l= slant height
B is the area of base, which is circle.
Area of circle (B)= πr²
Area of circle (B)=
∴ Area of circle (B)=
Finding slant height (l)
Formula;
⇒l =
∴ l=
Next, using the formula for finding surface area of cone.
Surface area of cone=
⇒ Surface area of cone=
∴ Surface area of cone= 90π cm²
Answer:
S.A. = 90 pi cm2
Step-by-step explanation:
1. pi(3.14) x radius(5) x slant height(13) = 90
Answers
Answer: k=-5
Step-by-step explanation:
The remainder theorem says that for any polynomial p(x) , if we divide it by the binomial x−a , the remainder is equal to the value of p(a) .
Therefore for if it is divided by x-2 and x+1 then its remainder must be p(2) and p(-1)
where,
According to the question,
p(2)+p(-1)=0