Answer:
Answer
Let the sides of triangles are 3x,4x and 5x.
And perimeter of the triangle is 144cm.
So , 3x+4x+5x=144
12x=144
x=12
so, the sides are triangle are 3(12)=36cm, 4(12)=48cm , 5(12)=60cm
so , the longest side is 60 cm.
Area of triangle =
s(s−a)(s−b)(s−c)
here , s=72 and a=36, b=48 c=60
=
72(72−36)(72−48)(72−60)
=
72(36)(24)(12)
=
746496
= 864
So, the area of triangle is 864 cm
2
and the height corresponding to longest side h=
60
2×864
=28.8cm
Answer:
76%
Step-by-step explanation:
Because there were 50 people present at his birthday, 50 will be our denominator. Only 38 people chose to eat it so that will be our numerator. 38 out of 50 people chose to have chocolate cake:
would be the fraction.
50x2 would be 100 and we need 100 to make it a percentage. We will multiply the bottom and the top by 2.
x 2 = 76/100 = 76%
76% of the people at the party picked chocolate cake.
Answer:
x = 5/26
Step-by-step explanation:
3/4 x + 5/8 =4x
The answer is 24 (proof in picture below)
Answer:
x = - 7, x = 6
Step-by-step explanation:
to find the x- intercepts set f(x) = 0, that is
x² + x - 42 = 0
To factor, consider the factors of - 42 which sum to + 1
These are + 7 and - 6
(x + 7)(x - 6) = 0
equate each factor to zero and solve for x
x + 7 = 0 ⇒ x = - 7
x - 6 = 0 ⇒ x = 6