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3 years ago

Timed Test Please Help.

Mathematics

1 answer:

Alinara [238K]3 years ago

5 0

Answer:

6.5 × 10¹¹

Step-by-step explanation:

I hope this helps you

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Solve the following system using the substitution method.

Liono4ka [1.6K]

X = (15 - 8y)/9

-5[(15 - 8y)/9] + 12y = -107

(-75/9) + (40/9) + 12y = -107

y = -8.59

x = [15 - 8(-8.59)]/9

x = 9.3
(x,y) = (9.3, -8.59)

3 0

3 years ago

At a family reunion, each of Eddie's aunts and uncles is getting photographed once. The

sveticcg [70]

Answer:

Step-by-step explanation:

It will just be 12, since the uncles can go in one group and fit 12 uncles, and than the aunts can get photographed in 2 groups that add up to 12

4 0

3 years ago

How many cubic centimeters of water can this paper cone cup hold?

weeeeeb [17]

Im probably wrong but 48π cubic centimeters

4 0

3 years ago

Last questions, plz help

Goryan [66]

Answer:

9. $a_n=7+6n$

10. $a_n=a_{n-1}+7$

Step-by-step explanation:

9. Given the sequence

$13, 19, 25, ...$

In this sequence,

$a_1=13\\ \\a_2=19\\ \\a_3=25\\ \\...$

Note that

$a_2-a_1=19-13=6\\ \\a_3-a_2=25-19=6,$

then the common difference in this sequence is $d=6$

You have

$a_1=13\\ \\d=6,$

then the explicit formula is

$a_n=a_1+(n-1)d\\ \\a_n=13+(n-1)\cdot 6\\ \\a_n=13+6n-6\\ \\a_n=7+6n$

10. Given the sequence

$-10,-3, 4, 11, ...$

In this sequence,

$a_1=-10\\ \\a_2=-3\\ \\a_3=4\\ \\a_4=11\\ \\...$

Note that

$a_2-a_1=-10-(-3)=-10+3=-7\\ \\a_3-a_2=-3-4=-7\\ \\a_4-a_3=11-4=7,$

then the common difference in this sequence is $d=7$

You have

$a_1=-10\\ \\d=7,$

then the recursive formula is

$a_n=a_{n-1}+d\\ \\a_n=a_{n-1}+7$

5 0

3 years ago

A $250 suit is marked down by 20%. Find the sale price.

Olenka [21]

20% off $250, 250 x 0.2= 50
The suit is $50 off, so $250-$50= $200

6 0

3 years ago

Read 2 more answers