Answer:
You can substitute
4
as
x
in the first equation because
x
and
4
are equal.
2
(
4
)
+
y
=
29
8
+
y
=
29
y
=
21
Step-by-step explanation:
Answer:
135 cm²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A =
h(a + b)
where h is the height and a, b the parallel bases
Here h = 9, a = 13 and b = 17 , thus
A =
× 9 × (13 + 17)
= 0.5 × 9 × 30
= 135 cm²
9 groups of 4 students each = (9 x 4) = 36
6 groups of 6 students each = (6 x 6) = 36
Answer:
<h2>90</h2><h2 />
Step-by-step explanation:
see attached image.
internal angle must be equal to 180
- ∠2 + 33 + 57 = 180
- ∠2 = 180 - 57 - 33
- ∠2 = 90