Answer:
41.7
Step-by-step explanation:
Answer:
10
Step-by-step explanation:
15 = 1/2 * b * 3
15 * 2 = 3 * b
b = 30/3
b = 10 m
First, let's multiply the first equation by two on the both sides:
<span>8x + 7y = 39 /2
</span>⇒ 16x + 14y = 78
Now, the system is:
<span>16x + 14y = 78
</span><span>4x – 14y = –68
</span>
After adding this up in the column:
(16x + 4x) + (14y - 14y) = 78 - 68
20x = 10
⇒ x = 10/20 = 1/2
y can be calculated by replacin the x:
<span>8x + 7y = 39
</span>⇒ 8 · 1/2 + 7y = 39
4 + 7y = 39
7y = 39 - 4
7y = 35
⇒ y = 35 ÷ 7 = 5
Answer:
<u><em>22 cm²</em></u>
Step-by-step explanation:
Work out the area of this triangle.
Area Formula: 1/2b * h where b = base (11cm) and h = height (4 cm)
1/2 *11 * 4 =
5.5 * 4 =
<u><em>22 cm²</em></u>
<span>24/56
= 3/7
hope it helps</span>
