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2 years ago

13

the table shows how the number of sit-ups Maria does each day has changed over time. At this rate, how many sit-ups will she do

on day 12? day 1- 17, day 2- 21, day 3- 25, day 4- 29, day 5- 33

1 answer:

tresset_1 [31]2 years ago

8 0

Answer:

61

Step-by-step explanation:

a = 17

d = 21 - 17 = 4

12th day: 17 + 4(12 - 1)

17 + 44

61

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S_A_V [24]

Answer: 19

Step-by-step explanation:

Multiplying both sides of the equation by $-3$ gives that $x=19$ .

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1 year ago

Help please!!! Find the area of the shaded region. All angles are right angles

kompoz [17]

Answer:

Area = $147 m^{2}$

Step-by-step explanation:

The area of the shaded region is equal to the total area of the full square minus the area of the non shaded region.

The area of a rectangle is its base times its high

So A=b*a.

For the full square, A1= $9m*23m=207m^{2}$

For the non shaded square, A2 = $15m * 4m = 60m^{2}$

So the shaded area is A1-A2 = $207 m^{2} -60 m^{2} = 147 m^{2}$

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2 years ago

The common ratio of a geometric series is 3 and the sum of the first 8 terms is 3280.

Pavlova-9 [17]

Answer:

The first term of the geometric series is 1

Step-by-step explanation:

In this question, we are tasked with calculating the first term of a geometric series, given the common ratio, and the sum of the first 8 terms.

Mathematically, the sum of terms in a geometric series can be calculated as;

S = a(r^n-1)/( r-1)

where a is the first term that we are looking for

r is the common ratio which is 3 according to the question

n is the number of terms which is 8

S is the sum of the number of terms which is 3280 according to the question

Plugging these values, we have

3280 = a(3^8 -1)/(3-1)

3280 = a( 6561-1)/2

3280 = a(6560)/2

3280 = 3280a

a = 3280/3280

a = 1

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2 years ago

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grandymaker [24]

Step-by-step explanation:

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3 years ago

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nlexa [21]

Step-by-step explanation:

///////hope it helps:)

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2 years ago