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yarga [219]
3 years ago
5

What is the following product?

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
5 0
Hello : 
by identity : (a-b)² = a² +b² -2ab
(x√7-3√8)(x√7-3√8) = (x√7-3√8)² = (x√7)²+(3√8)² -2(x√7)(3√8)
                                                    =7x²+72 -6x√56
                                                     = 7x²+72-6x√(14×4)
                                                     = 7x²+72-12x√(14).because  :√(14×4)=2√14
Answer B
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After going on a diet,Amy finds that her weight has decreased by 25%.If her weight now is 75kg how much does her weight before?​
Rainbow [258]

Answer:

Her weight before was 100kg.

Step-by-step explanation:

This question can be solved using a rule of three.

Amy finds that her weight has decreased by 25%

So her weight is 100-25 = 75% = 0.75 of the original amount(what it was before).

Her current weight is 75kg.

Her previous weight was x, which is 100% = 1.

So

75 - 0.75

x - 1

0.75x = 75

x = \frac{75}{0.75}

x = 100

Her weight before was 100kg.

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3 years ago
What is 2/5 written as a decimal and as a percent
Soloha48 [4]
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6 0
3 years ago
Read 2 more answers
the table above represents what type of function x 0,1,2,3 y -6 , -5 ,2 ,21 a.) linear b.) neither linear or nonlinear c.) linea
Juliette [100K]

Answer:

D

Step-by-step explanation:

Given the table

\begin{array}{ccccc}x&0&1&2&3\\ \\y&-6&-5&2&21\end{array}

The change in x is

1-0=2-1=3-2=1

The change in y is

-5-(-6)=1\\ \\2-(-5)=7\\ \\21-2=19

Since for the same change in x, the change in y is different, given table represents nonlinear function.

3 0
3 years ago
Which numbers are common multiples of 3 and 5? show the steps a)15 b) 135 c)135 d) 50
Vera_Pavlovna [14]
The answer is= a(15) and b(135) and c (135)
8 0
4 years ago
. Evaluate each expression given that X = -2, Y = 8 and Z = 4
Liula [17]
Hello:-
this(*)is counted as multiplication
1. 4*2 + (-2+8)
=8+(6)
=14
2. (-2)*2 + 4
= -4+4
=0
3. 8*4/-2
= -32/2 (as -ve sign cannot be in denominator)
= -16
4. -2*4/8
= -8/8
= -1
5. -2*8/4
= -16/4
= -4
therefore it is a. -4
I hope it will help u !!!!!!!!!
8 0
3 years ago
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