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3 years ago

A rectangular picture frame has an area of 45 square inches. If it has a length of 7 and 1/2 inches, what is its width?

Mathematics

2 answers:

svetlana [45]3 years ago

7 0

Answer:

Step-by-step explanation:

To find the width/length when you know the area and the length or width, you just divide the area by the known side.

45/7.5 = 6

lukranit [14]3 years ago

4 0

6

Area/height

45/7.5

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alisha [4.7K]

Yes that it's correct because numbers that are 5+ round up and numbers that are 4-stay the same.

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3 years ago

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Suppose an=3an-1 -5an-2 -4an-3. and a4= -7, a5=-36, a6=-85 , find a1 , a2, a3

maria [59]

Answer:

$a_1=4\\\\a_2=0\\\\a_3=3$

Explanation:

The equation is:

$a_n=3a_{n-1}-5a_{n-2}-4a_{n-3}$

and

$a_4=-7, a_5=-36, a_6=-85$

1. Subsittute n = 6 into the equation:

$a_6=3a_{5}-5a_{4}-4a_{3}$

Now subsititute the known values:

$-85=3(-36)-5(-7)-4a_{3}$

You can solve for $a_3$

$-85=-108+35-4a_{3}\\\\4a_3=12\\\\a_3=12/4\\\\a_3=3$

2. Substitute n = 5 into the equation:

$a_5=3a_{4}-5a_{3}-4a_{2}$

Substitute the known values and solve for $a_2$

$-36=3(-7)-5(3)-4a_{2}\\\\4a_2=-21-15+36=0\\\\a_2=0$

3. Substitute n = 4 into the equation, subsitute the known values and solve for $a_1$

$a_4=3a_{3}-5a_{2}-4a_{1}$

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3 years ago

Prove that the value of the expression (125^2+25^2)(5^2–1) is divisible by 3

Radda [10]

Step-by-step explanation:

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Since 30 is divisible by 3

Thus, A is divisible by 3

Good luck!

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4 years ago

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melamori03 [73]

Answer:

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3 years ago

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vampirchik [111]

Answer:

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