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3 years ago

What is 2a - 8a = 12 - 8a

Mathematics

2 answers:

kicyunya [14]3 years ago

6 0

2a-8a=12-8a
now add 8a to both side and you get

2a= 12

divide both sides by 2 and you get

a=6

kodGreya [7K]3 years ago

6 0

2a-8a=12-8a

-6a=12-8a

add 8a to -6a=2a

2a=12

12/2

a=6

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Plz helpppp will mark brainliesttttt

marishachu [46]

Answer:

Step-by-step explanation:

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P=2(20+b)

P=40+2b

A) P(6)=40+12=52ft TRUE

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D) P(12)=40+24=64ft FALSE

E) P(11)=40+22=62ft FALSE

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2 years ago

Muke is sick with the flu but he still cors to school on monday. He areives at 8am and by 9am (hour 1) muke has already infected

Volgvan

Answer:

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Step-by-step explanation:

Given

See attachment for complete question

Solving (a): Complete the table

Let

$x = hours$

$y = persons$

From the table question, we have:

$(x_1,y_1) = (0,1)$

$(x_2,y_2) = (1,2)$

$(x_3,y_3) = (2,4)$

The pattern follows that, an increment in x by doubles the value of 1.

So, the other values are:

$(x_4,y_4) = (3,8)$

$(x_5,y_5) = (4,16)$

$(x_6,y_6) = (5,32)$

$(x_7,y_7) = (6,64)$

$(x_8,y_8) = (7,128)$

So, the complete table is:

$\begin{array}{ccccccccc}{Hours} & {0} & {1} & {2} & {3} & {4}& {5} & {6} & {7} \ \\ {Persons} & {1} & {2} & {4} & {8} & {16}& {32} & {64} & {128} \ \end{array}$

Solving (b): The graph

The table follows an exponential function:

$y = ab^x$

We have: $(x_1,y_1) = (0,1)$

This gives:

$y = ab^x$

$1 = ab^0$

$b^0 \to 1$

So:

$1 = a*1$

$1 = a$

$a =1$

Also: $(x_5,y_5) = (4,16)$

This gives:

$y = ab^x$

$16 = 1 * b^4$

$16 = b^4$

$16 \to 2^4$

So:

$2^4 = b^4$

Cancel the exponents (4)

$2 =b$

$b = 2$

So, the function $y = ab^x$ is:

$y = 2^x$

<em>See attachment 2 for graph</em>

6 0

3 years ago

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Answer:
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Read 2 more answers

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JulsSmile [24]

Answer:

Step-by-step explanation:

Substitute 8 where there is an x

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