7 + 14 + 21 + ... + 105 =
= 7(1 + 2 + 3 + ... + 15)
= 7(15)(16)/2
= 840
Which transformation will map figure Q onto figure Q
2 answers:
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Answer:
The width of the banner is 4 inch and the length of the banner is 28 inch
Step-by-step explanation:
Given
Length is seven times its width
Let the width be "X", then length would be 7X
The banner is of rectangular shape.
Its area is 112 square inches
Hence, the width of the banner is 4 inch and the length of the banner is 4*7 i.2 28 inch
Answer:
m∠B = .
Step-by-step explanation:
Since the three sides of the triangle are given, then we apply cosine rule.
=
+
- 2ac Cos B
But, a = 660 cm, b = 680 cm, and c = 100 cm.
So that;
=
+
-2(660 x 100) Cos B
462400 = 435600 + 10000 - 132000 Cos B
462400 = 445600 - 132000 Cos B
132000 Cos B = 445600 - 462400
= -16800
Cos B =
= -0.1273
B = -0.1273
=
Thus, measure of ∠B is .