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ivann1987 [24]
3 years ago
13

Please help me with this question ​

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Answer:

c 7

Step-by-step explanation:

5a^3 + 9a^2 +7a+4

The coefficient of a is the number in front of a

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The distance between two towns is 21.673 km. Round of the distance to nearest 0.01 km.
Andreyy89

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3 0
2 years ago
In right triangle ABC, shown below, cos C 9√130/9 find AC.
Afina-wow [57]

Answer:

<h2>AC = 9</h2>

Step-by-step explanation:

cosine=\dfrac{adjacent}{hypotenuse}\\\\\text{We have:}\\\\\cos C=\dfrac{9\sqrt{130}}{130}\\\\adjacent=AC\\\\hypotenuse=\sqrt{130}\\\\\text{Substitute:}\\\\\dfrac{9\sqrt{130}}{130}=\dfrac{AC}{\sqrt{130}}\qquad\text{cross multiply}\\\\130AC=(9\sqrt{130})(\sqrt{130})\qquad\text{use}\ \sqrt{a}\cdot\sqrt{a}=a\\\\130AC=(9)(130)\qquad\text{divide both sides by 130}\\\\\dfrac{130AC}{130}=\dfrac{(9)(130)}{130}\\\\AC=9

6 0
3 years ago
A triangle has three sides(4x),(2x-6),and(10-x). Using the variable x, write an expression to define the perimeter
bezimeni [28]

Answer:

5x+4

Step-by-step explanation:

well the perimeter is the sum of all sides

so we have

P=4x+2x-6+10-x\\\\P=(4x+2x-x)+(-6+10)\\\\P=5x+4

8 0
3 years ago
Read 2 more answers
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