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kap26 [50]
3 years ago
10

Elevii clasei a IV-a au fost la patinoar. Stiind ca numarul baietilor reprezinta jumatate plus 3 din numarul copiilor si ca numa

rul fetelor este 10, afla cati copii au fost la patinoar.
Mathematics
1 answer:
earnstyle [38]3 years ago
3 0

Step-by-step explanation:

Să presupunem că x să fie numărul de copii

De\:asemenea

să fiu fetele

f = 10

și

b\:=\:\frac{x}{2}\:+\:3

f\:+\:b\:=\:x

substituirea valorilor

10\:+\:\frac{x}{2}\:+\:3\:=\:x

20\:+\:x\:+\:6\:=\:2x

x\:=\:26     copii au fost la patinoar

b=\frac{26}{2}+\:3

b\:=\:16\:baieti

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2.) FIND EF.
Naddika [18.5K]

The measure of EF from the given diagram is 6 units

<h3>Secant secant theorem</h3>

The theorem states that if two secants are drawn from an external point to a circle, then the product of the measures of one secant's external parts is the same as the product of the other external part.

Mathematically according to the given figure;

4(4+2x) = 5(5+x)

Expand

16 + 8x = 25 + 5x

Collect the like terms

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EF = 2x

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Hence the measure of EF from the given diagram is 6 units

Learn more on secant theorem here: brainly.com/question/10732273

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8 0
2 years ago
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hoa [83]

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Step-by-step explanation:

Since we have given that

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So, we will use "Bayes theorem":

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