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3 years ago

7

Ana age is 8 years less than 4 times her sisters age. Write an expression for Ana’s age. How old is ana if her sister is 5 years

old?

1 answer:

DanielleElmas [232]3 years ago

3 0

Answer:

Ana is 12

Step-by-step explanation:

5x4=20

20-8=12

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Round to the nearest tenth.

laila [671]

Answer:

8.2 units

Step-by-step explanation:

Given that the only information for our triangle are 2 sides and 1 angle, we must use the Law of Cosines to find side BC

<u />

<u>Recall the Law of Cosines</u>

<u /> $a^2=b^2+c^2-2bc\cdot cos(A)$

<u>Identify angles and sides</u>

<u /> $m\angle A=23^\circ\\a=BC=?\\b=AC=14\\c=AB=6$

<u>Solve for side "a"</u>

<u /> $a^2=b^2+c^2-2bc\cdot cos(A)\\\\a^2=14^2+6^2-2(14)(6)\cdot cos(23^\circ)\\\\a^2=196+36-168cos(23^\circ)\\\\a^2=222-168cos(23^\circ)\\\\a=\sqrt{222-168cos(23^\circ)}\\ \\a\approx8.2$

Therefore, the length of line segment BC is about 8.2 units

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2 years ago

Factor out the greatest common factor 30c-45d

olga nikolaevna [1]

Simplifying
30c + -45d

Factor out the Greatest Common Factor (GCF), '15'.
15(2c + -3d)

Final result:
15(2c + -3d)

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3 years ago

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A group of 15 explorers to the south pole had just enough food to last them for 40 days how long would the food last if all of a

Trava [24]

Answer:

3 days

Step-by-step explanation:

15-3=12

40/12= 3.3

round to 3

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3 years ago

I will a!or u BRAINLIEST pls answer this question!!!

Alex_Xolod [135]

I think it’s B I’m not surr

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3 years ago

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What is the completely factored form of this polynomial?<br> 18x^3– 120x^2-42x

Vlada [557]

Answer:

6×(3×+1)(×-7)

Step-by-step explanation:

18×^3-120×^2-42×

=6×(3×+1)(×-7)

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3 years ago

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