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Masja [62]
3 years ago
9

(a+2)(a-1) - (a+1)(a-2), if a = 2​

Mathematics
1 answer:
Artist 52 [7]3 years ago
8 0

Answer:

4

Step-by-step explanation:

(a+2)(a-1) - (a+1)(a-2)

put a=2

(2+2)(2-1) - (2+1)(2-2)

4*1 -3*0

4-0

4

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7/7, solve for k, explain too please
ludmilkaskok [199]

Answer:

k = 7.3333333  ...

You can round accordingly of write the fraction form

Step-by-step explanation:

4/k = 6/11

6 ÷ 4 = 1.5

11 ÷ 1.5 = 7.3333333 ... (repeating)

4/7.333 = 6/11

7 0
3 years ago
which of the following is not the characteristics of numerical computing? a) aacuracy b) efficiency c) stability d)truncatating​
Mkey [24]

Based on the explanation below, the option which is not the characteristics of numerical computing d) truncatating​.

<h3>What is numerical computing?</h3>

Numerical computing is a technique for tackling difficult mathematical problems with only basic arithmetic operations.

The method entails the creation of mathematical models that can be solved using arithmetic procedures.

The three characteristics of numerical computing are accuracy, efficiency, and stability.

Learn more about accuracy here: brainly.com/question/15276983.

#SPJ1

7 0
2 years ago
Im in dyer need of how to solve these problems
melisa1 [442]
#4)
{ A}
Triangle ABC is congruent to triangle YXZ. How do I know this?
 Look at the angles and adjacent (bottom) line.
Because Angle A and Angle Y are both equal to (what I believe says) 78 degrees, they are equal. 
Next, Angle B is equal to Angle X because it is the angle that connects the adjacent (bottom) line and the hypotenuse (top line). Even though they have no measurements or tick marks, it's the process of elimination.
Finally, Angle C and Angle Z. We know that these are equal do to their degree similarity of (what I think is) 65.

{B} Triangle ABC is congruent to Triangle RSQ. How do I know this?
Because Angle A is congruent to the only other angle there, Angle R.
Next, B and S are congruent. If you think of them as angles, then you can see that "angle" b is connected to the leg of AB and BC. AC has one tick mark, as does RS. BC has no tick or anything to note it's congruence. So because Point be is stick in between a leg with one tick and one leg with no tick, look for the similarity in triangle RSQ. The similarity showing as S. You should understand enough now to know how I got how C and P are congruent. 

#5) Sadly I cannot read the diagram they provide, so I cannot help with it.

#6) The length of BC: ?  The length of XZ:   ?  Measure of Angle BZX: 55 degrees. 
5 0
3 years ago
Traci collects donations for a dance marathon. One group of sponsors will donate a total of $6 for each hour she dances. Another
hoa [83]

Answer:155 hours

Step-by-step explanation:

$75+$6h=$1,000

Subtract $75 on both sides:

$75-$75+$6h=$1,000

$6h=$925

Divide 6 on both sides:

6/6h=925/6

h=154.1666667

After I rounded it and it was 155 hours

6 0
3 years ago
In which expression should the exponents be multiplied?
valentina_108 [34]
\left(a^n\right)^m=a^{n\cdot m}\\\\therefore,\ your\ answer:\\\\\left(6^{10}\right)^{-7}=6^{10(-7)}=6^{-70}
6 0
3 years ago
Read 2 more answers
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