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3 years ago

David made an error when determining the product of (–2.5)(–8.3).

Mathematics

2 answers:

Serhud [2]3 years ago

6 0

Answer:

step 3

Step-by-step explanation:

when you multiply an even amount of negative numbers you will always get a positive result thus the answe would be 16.6 + 4.15 as in positive numbers

choli [55]3 years ago

4 0

Answer:

Step 3

Step-by-step explanation:

#Nova

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2.60 cm equals how many mm

kati45 [8]

26 because there are 10 mm in a centimeter.

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3 years ago

Factor the following trinomial. (Hint: Solve the equations first.)<br><br> x²-2x-2

Alex_Xolod [135]

Answer:

$(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2} -2x-2=0$

$a=1\\b=-2\\c=-2$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(1)(-2)}} {2(1)}$

$x=\frac{2(+/-)\sqrt{12}} {2}$

$x=\frac{2(+/-)2\sqrt{3}} {2}$

$x_1=\frac{2(+)2\sqrt{3}} {2}=1+\sqrt{3}$

$x_2=\frac{2(-)2\sqrt{3}} {2}=1-\sqrt{3}$

therefore

$x^{2} -2x-2=(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

5 0

3 years ago

Why can you divide zero but can't divide by zero?

oee [108]

Answer:

0 has no multiplicative inverse :)

Step-by-step explanation: Hope this helps

8 0

2 years ago

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A car costs $25,750.00 and depletes in value by 20% per year. How much would the car be worth after 5 years?

gtnhenbr [62]

Answer : B

First year : 25750 x 80% = 20600
Second year : 20600 x 80% = 16480
Third year : 16480 x 80% = 13184
Fourth year : 13184 x 80% = 10547.2
Fifth year : 10547.2 x 80% = 8437.76

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2 years ago

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Convert 50 percentage into fraction

Paul [167]

Answer:

50/100, simplified to 1/2

Step-by-step explanation:

50% means half of 1.

1/2=.5 which is half of 1.

1=100%

.5=50%

1/2=50%

6 0

3 years ago

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