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notsponge [240]
3 years ago
10

If a • b = b, what must the value of a be?

Mathematics
1 answer:
Usimov [2.4K]3 years ago
6 0

Answer:

the value of a would be one, i think

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Plz help me.<br> how to solve | k-10 | = 3<br> will give brainliest!!!
12345 [234]
Add ten to both sides:
K = 13
To check my work you can plug 13 in for k:
13-10=3
Hope this helps (:
3 0
3 years ago
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If the probability of p(m and n) =0.2 p(m)=0.4 and m and independent events, what is p(n)?
abruzzese [7]

Answer:

P(n) = 0.5

Step-by-step explanation:

For two events which are independent, we use the multiplication rule which states P (A and B) = P(A) * P(B). Substitute P(m) = 0.4 and P(m and n) = 0.2 into this formula.

P (m and n) = P(m) * P(n)

0.2 = 0.4*P(n)

Divide by 0.4 on both sides.

0.2 / 0.4 = P(n)

0.5 = P(n)

4 0
3 years ago
Which equation does the graph of the systems of equations solve? It's a quadratic graph opening down and quadratic graph opening
vodka [1.7K]

Answer:

D. -x^{2} -2x+3=2x^{2} -8x+3

Step-by-step explanation:

We are given that,

The graph of the system of equations is a 'quadratic graph opening down and a quadratic graph opening up'.

This means that one quadratic equation will have leading co-efficient positive and other will have leading co-efficient negative.

So, we get that options A and B are discarded.

Further it is provided that the graph intersect at ( 0,3 ) and ( 2,-5 ).

This means that the pair of points must satisfy the given system of equations.

So, according to the options:

C. -x^{2} -2x+3=2x^{2} -8x-3

Putting x = 0, gives 3 = -3, which is not possible.

So, option C is dicarded.

D. -x^{2} -2x+3=2x^{2} -8x+3

Putting x = 0 gives 3 = 3 and x = 2 gives -5 = -5.

Hence, the graph of the given system solves the equation -x^{2} -2x+3=2x^{2} -8x+3.

7 0
3 years ago
Help me please 38 points!!!
Anon25 [30]

Answers:

1. 10*5 =50

2. \frac{1}{2} *4*3=2*3=6

3. 10*3*10=30*10=300

4. 2(5)+2(7)=10+14=24

5. 4*2^{2} =4*4=16

6. 7*8*2=56*2=112

7. 1.3*15=\frac{13}{10}*15=19.5

8. 3(6+11)=3*17=51

9. \frac{45}{5} =\frac{5*9}{5} =9

10. 2*14^{2} =2*196=392

11. 5*12*7=60*7=420

12. \frac{1}{2} *9*12=\frac{12}{2} *9=54

13. \frac{1}{2}(24)(9+21)=12*30=360

14. 14*13=182

15. 16*8*5=128*5=640

16. \frac{75}{5}=\frac{5*15}{5}=15

17. 2(5^{2} )=2*25=50

18. 8(2.5+4.2)=8*6.7=53.6

19. \frac{1}{2} (3)(5+6)=1.5*11=16.5

20. 3*14(6^{2} )=3*14*36=42*36=1,512

5 0
3 years ago
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4X-3 (x²+2x)<br> Find (f-g) (4)
Helen [10]

Answer:

-11

Step-by-step explanation:

assuming 4x-3 = f(x) and the other equation = g(x)

(4x-3) - (x^2 +2x)

(4(4)-3) - (4^2 +2(4)

(16-3)-(16+8)

(13)-(24)

-11

4 0
3 years ago
Read 2 more answers
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