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4 years ago

Find S25 for -7+ -2 + 3 + 8 +…

1 answer:

5 0

We know S(n) = n/2 [ 2a + (n-1)d ]
Here, n = 25
a = -7
d = -2-(-7) = -2+7 = 5

Substitute their values,
S(25) = 25/2 [2(-7) + (25-1)5 ]
S(25) = 25/2 [-14 + 120 ]
S(25) = 25/2 [106 ]
S(25) = 25 [ 53 ]
S(25) = 1325

In short, Your Answer would be 1325

Hope this helps!

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Castroville Street and Vindale Avenue intersect. If the diagonal distance across the intersection is 10 meters and Castroville S

butalik [34]

Answer:

The length of Vindale Avenue = x = AB = 6 m

Step-by-step explanation:

Given data

Diagonal distance AC = 10 m

BC = length of castroville Street = 8 m

Let the length of Vindale Avenue = x

Thus a Δ ABC is formed.

From the Δ ABC

$AC^{2} = AB^{2} + BC^{2}$

$10^{2} = x^{2} + 8^{2}$

$x^{2} = 100 - 64$

$x^{2} = 36$

x = 6 m

Therefore the length of Vindale Avenue = x = AB = 6 m

4 0

3 years ago

marco needs to buy some cat food. At the nearest store, 3 bags of cat food cost 13.50. How much would Marco spend on 5 bags of c

eimsori [14]

Answer:

$22.50

Step-by-step explanation:

if 3 bags of cat food = 13.50, divide 13.5 by 3 to get the cost of one bag, which is $4.50.

since hes getting 5, we can use 13.50 once and then the price of one bag (4.5) twice for the other two.

so that would be 13.5 + 4.5 + 4.5 = $22.50

hope this helped :)

5 0

3 years ago

Read 2 more answers

Please answer my question, the file below contains the question.

kirill115 [55]

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3 years ago

Read 2 more answers

How can you use models to evaluate and compare expressions? Please someone help me!

hodyreva [135]

You can just do it by having enough building blocks lol

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3 years ago

What is the simplified form of the expression? (2x^6) (3x ^ 1/2) A. 6x ^ 13/ 2 B. 5x ^ 13/2 c. 5x3 d. 6x3

Blizzard [7]

The given expression is (2x⁶)(3x^1/2)
Now, multiply 2 with 3, the expression becomes 6.x⁶.x^1/2
Now, as the base is same, add the exponents:
The expression becomes 6x^13/2

The option A is correct

7 0

4 years ago