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2 years ago

PLEASE HELP ME WITH THIS FOR BRAINLIEST AND A UNBURNED COOKIE

Mathematics

2 answers:

schepotkina [342]2 years ago

8 0

I think it would be 43. 8 times 5 is 40, plus 3 would equal 43. if it’s not that then it would be 55. (11 times 5)

Amiraneli [1.4K]2 years ago

3 0

Answer:

Step-by-step explanation:

ur replacing z in 3+8z with 5 and 8z is the same thing as 8xZ so the new equation is

3+8x5

3+40

43 is your answer

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What is 35% of 76.6?

aleksandrvk [35]

Answer:

26.6

Step-by-step explanation:

Solution for What is 35 percent of 76:

35 percent *76 =

( 35:100)*76 =

( 35*76):100 =

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Now we have: 35 percent of 76.6 = 26.6

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7 0

3 years ago

Factorise 9w² - 100<br><br><br>

ohaa [14]

Answer:

$9\, w^{2} - 100 = (3\, w - 10) \, (3\, w + 10)$ .

Step-by-step explanation:

Fact:

$\begin{aligned} & (a - b)\, (a + b)\\ =\; & a^{2} + a\, b - a\, b - b^{2} \\ =\; & a^{2} - b^{2} \end{aligned}$ .

In other words, $(a^{2} - b^{2})$ , the difference of two squares in the form $a^{2}$ and $b^{2}$ , could be factorized into $(a - b)\, (a + b)$ .

In this question, the expression $(9\, w^{2} - 100)$ is the difference between two terms: $9\, w^{2}$ and $100$ .

$9\, w^{2}$ is the square of $3\, w$ . That is: $(3\, w)^{2} = 9\, w^{2}$ .
On the other hand, $10^{2} = 100$ .

Hence:

$9\, w^{2} - 100 = (3\, w)^{2} - (10)^{2}$ .

Apply the fact that $a^{2} - b^{2} = (a - b) \, (a + b)$ to factorize this expression. (In this case, $a = 3\, w$ whereas $b = 10$ .)

$\begin{aligned}& 9\, w^{2} - 100 \\ =\; & (3\, w)^{2} - (10)^{2} \\ = \; & (3\, w - 10)\, (3\, w + 10)\end{aligned}$ .

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C

work:

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Step-by-step explanation:

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