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3 years ago

Alex had 23 coins in his collection. He found 5 coins and gave Bill 8 coins. How many coins does Alex have now?

Mathematics

2 answers:

sashaice [31]3 years ago

8 0

Alex has 20 coins now

Hatshy [7]3 years ago

5 0

Answer:

alex has 20 coins since 23 + 5 - 8 = 20

step-by-step explanation:

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1. What is the solution of n² – 49 = 0? (1 point)

maks197457 [2]

Answer:

1. $n=\pm7$

2. $x=\pm7i[tex]3.[tex]\pm 12x =a$

4. 22

Step-by-step explanation:

1. $n^2 - 49 = 0$

$n^2 =49$

$n= \sqrt{49}$

$n=\pm7$

2. $x^2+64 = 0$

$x^2 =-64$

$x= \sqrt{49}$

$x=\pm7i[tex]3. Area of square = [tex]a^{2}$

Where a is the side

We are given an area o square = $144x^{2}$

So, $144x^{2}=a^{2}$

$\sqrt{144x^{2}}=a$

$\pm 12x =a$

4. We are given that the solution of quadratic equation -9 and 9

So, equation becomes:

$(x+9)(x-9)=0$

$x^2- 81=0$

So, in the given equation $x^2 + z = 103$

z should be the number from which if we subtract 103 so we get 81

Substitute z = 22

$x^2 + 22 = 103$

$x^2 + 22 -103=0$

$x^2 -81=0$

Thus the value of z is 22

8 0

3 years ago

Read 2 more answers

Juan buys c children’s tickets at each $8 each. He also buys one adult ticket for $12. Write three equivalent expressions for th

salantis [7]

Let T = total cost

Let 8c = total amount of children tickets

Let 12a = total amount of adult tickets

T = 8c + 12a

7 0

4 years ago

Share 747 pound in the ratio 2:7 betwen tom and ben

Yuliya22 [10]

2p + 7p = 747
9p = 747 divded by 9 = 83
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Hope it helps

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3 years ago

19z+12=20z–8<br> help i dont really understanddd!!!

alekssr [168]

Answer:

z = 20

Step-by-step explanation:

subtract 19z from 20z, and add 8 to 12. you will be left with 20 = 1z. Divide 1 by 20 and you will have Xz =20.

I hope this helps!

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3 years ago

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Mars2501 [29]

Answer:

6.2 percent

Step-by-step explanation:

47.81 - 45 = 2.81

2.81/45

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3 years ago