3 years ago

5. Simplify when a = 4 and b = 3; 2a – 21 ÷ b *

Mathematics

2 answers:

Sever21 [200]3 years ago

8 0

Answer:

Step-by-step explanation:

insert the values for a and b and solve.

kow [346]3 years ago

4 0

The answer is one because of pemdas but first you fill the letters with the suppose number and then do your pemdas steps

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40 points

siniylev [52]

Answer:

The answer is high inflation

Step-by-step explanation:

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4 years ago

please I need help revising maths I struggle maths u don't know want to do or how I should revise it pls help me mathematicians

vfiekz [6]

Answer:

Solving mathematics isn't as difficult as we think.All you have to do is follow the steps and practice more questions

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4 0

3 years ago

Can i get help plzz .....

wel

Answer:

$0.30

Step-by-step explanation:

If you already spent $5 then you have $6 remaining so you will just divide 6 and 20 and you will get 0.3 so $0.30

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3 years ago

I need help with three and four

mart [117]

Answer:

3: $a^{2}+2ab+b^{2}$

4: $8x^{3} -12x^{2}+6x-1$

Step-by-step explanation:

Question 3 can be re-written as:

$(a+b)(a+b)$

which equals:

$a^{2}+2ab+b^{2}$

Question 4 can be re-written as:

$(2x-1)(2x-1)(2x-1)$

Doing the first 2 brackets gives us:

$(4x^{2} -4x+1)(2x-1)$

Expanding these two:

$8x^{3} -4x^{2} -8x^{2} +4x+2x-1$

Simplifying it:

$8x^{3} -12x^{2}+6x-1$

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2 years ago

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Use quadratic equation to find the roots of the following equations

sertanlavr [38]

See the attachment below.

Hope it helps!

3 0

3 years ago

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