John has 28 cards. He gives his friend Timmy 10 cards and gave the rest to his brother. Then he gained 10 cards and lost 3. How many cards deos he have now?

7 cards

Step-by-step explanation:

Well if John started off with 28 and gave away 10,

28-10=18

Gave tthe last 18 to his brother

18-18 = 0

Gained 10

0+10=10

Lost 3

10-3=7

Hence, John has 7 cards left.

its b

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.