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2 years ago

+23-(-20)=43 how is that so?Explanation included

Mathematics

1 answer:

valina [46]2 years ago

7 0

Answer:

Well, when adding and subtracting negatives

You can change the symbol and positive or negative of the second number like

2 + (-1) is equal to 2 - 1

23 + 20 = 43

Therefore, 23 -(-23) = 43 because when you take away a debt you add to your balance.

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A skateboarding club randomly surveyed 200 people who visited the club's website about their favorite skateboard brand. The data

denis-greek [22]

Answer: 36/200 = 18/100 = 18%

Step-by-step explanation:

5 0

3 years ago

Determine the ratio in which the point (–6, m) divides the join of A(–3, –1) and B(–8, 9). Also, find the value of m.

PSYCHO15rus [73]

Answer:

Ratio = 3 : 2 and value of m = 5.

Step-by-step explanation:

We are given the end points ( -3,-1 ) and ( -8,9 ) of a line and a point P = ( -6,m ) divides this line in a particular ratio.

Let us assume that it cuts the line in k : 1 ratio.

Then, the co-ordinates of P = $( \frac{-8k-3}{k+1},\frac{9k-1}{k+1} )$ .

But, $\frac{-8k-3}{k+1}$ = -6

i.e. -8k-3 = -6k-6

i.e. -2k = -3

i.e. $k = \frac{3}{2}$

So, the ratio is k : 1 i.e $\frac{3}{2} : 1$ i.e. 3 : 2.

Hence, the ratio in which P divides the line is 3 : 2.

Also, $\frac{9k-1}{k+1}$ = m where $k = \frac{3}{2}$

i.e. m = $\frac{\frac{9 \times 3}{2}-1}{\frac{3}{2}-1}$

i.e. m = $\frac{27-2}{3+2}$

i.e. m = $\frac{25}{5}$

i.e. m = 5.

Hence, the value of m is 5.

4 0

3 years ago

Read 2 more answers

Help

Lubov Fominskaja [6]

Answer:

x=5

Step-by-step explanation:

(8x-8)3/2=64

(24x-8)/2=64 -You are distributing the three

12x-4=64 -You divide the whole thing by two

12x=60 -You subtract the four from both sides

x=5 - You divided the twelve from both sides

Hope this helps!

7 0

3 years ago

3/24 in lowest terms

lesya [120]

3/4 =3/4

4/6= 2/3

8/18= 4/9

9/15=3/5

7/21= 1/3

10/12= 5/6

4/8= 1/2

10/16=5/8

15/20= 3/4

3/30=1/10

7 0

3 years ago

What is the average rate of change of f(x)=x2+x−6 between x=1 and x=3 ?

fredd [130]

Answer:

Step-by-step explanation:

Substitute 1 in place of x and the result is -4.

Again substitute 3 in place of x and the result is 6.

Change=6-(-4)=10

4 0

2 years ago

+23-(-20)=43 how is that so?Explanation included​

+23-(-20)=43 how is that so?Explanation included