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3 years ago

PLEASE HELP QUICK

Mathematics

1 answer:

pishuonlain [190]3 years ago

5 0

Answer:

r= 18

Step-by-step explanation:

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2a + 2b = c for b<br> Solve for b

Leokris [45]

2a + 2b = c

Subtract 2a from both sides

2b = -2a + c

Divide both sides by 2

b = -a + (c/2)

7 0

3 years ago

HELP QUICK!! solve by substitution and show work please

madam [21]

Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:

x= 1, y= -4

7 0

2 years ago

The common ratio of a geometric series is \dfrac14 4 1 start fraction, 1, divided by, 4, end fraction and the sum of the first

myrzilka [38]

Answer:

The common ratio of a geometric series is \dfrac14

start fraction, 1, divided by, 4, end fraction and the sum of the first 4 terms is 170

The first term is 128

Step-by-step explanation:

The common ratio of the geometric series is given as:

$r = \frac{1}{4}$

The sum of the first 4 term is 170.

The sum of first n terms of a geometric sequence is given b;

$s_n=\frac{a_1(1-r^n)}{1-r}$

common ratio, n=4 and equate to 170.

$\frac{a_1(1-( \frac{1}{4} )^4)}{1- \frac{1}{4} } = 170$

$\frac{a_1(1- \frac{1}{256} )}{ \frac{3}{4} } = 170\\\\ \frac{255}{256} a_1 = \frac{3}{4} \times 170\\\\\frac{255}{256} a_1 = \frac{255}{2} \\\\\frac{1}{256} a_1 = \frac{1}{2} \\\\ a_1 = \frac{1}{2} \times 256\\\\a_1 = \frac{1}{2} \times 256 \\\\= 128$

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2 years ago

The length of a rectangle is increased by 20%. The width is decreased by 20%.

jenyasd209 [6]

Answer:

Step-by-step explanation:

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2 years ago

Round 1.625 to the nearest tenth

Anni [7]

Answer:

1.6

Step-by-step explanation:

the number 6 is one place after the decimal so it's where the tenth is, and the number after is 4 or below which in this case is 2 so the number rounds down to 1.6

6 0

2 years ago

Read 2 more answers