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Nana76 [90]
3 years ago
7

1. Suma a trei numere este 176. Al doilea numar este cu 28 mai mare decat al treilea, iar primul este egal cu diferenta acesteia

. Aflati cele trei numere.
2. Trei saci cu grau cantaresc la un loc 208 kg. Cat cantereste fiecare, daca primii doi au aceeasi greutate, iar al treilea are cu 16 kg mai mult decat primul?

3. Suma a trei numere este 340. Suma primelor doua numere este mai mare decat suma ultimelor doua cu 80, iar al doilea numar este cu 50 mai mare decat al treilea numar. Care sunt numerele?
4. Suma a trei numere impare consecutive este 303. Aflati numerele.

Va rog frumos rezolvare pentru clasa a - 3- a dau 24 de puncte!!!
Mathematics
1 answer:
baherus [9]3 years ago
7 0
Răspunsul corect va fi numărul 4. Supãrat dacã meu vorbind nu este cel mai bun, vorbesc limba engleza. Dacă ai nevoie de numere consecutive, sunt 99, 102 şi 103. 
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Tpy6a [65]

Answer:

(1) 0.08x + 16

(2) 0.08x + 16=0.12x + 14

Step-by-step explanation:

Checking account A has a monthly fee of $16 and a per-check fee of $0.08

Per check fee is a constant rate that is 0.08

Let x represents the number of checks Cecily writes per month

1 check fee = 0.08

x checks fee = 0.08x

monthly fee is $16 , we add that as well

So total monthly fee charges for account A  is

0.08x + 16

checking account B has monthly fee of $14 and a per-check fee of $0.12.

1 check fee = 0.12

x checks fee = 0.12x

monthly fee is $14 , we add that as well

So total monthly fee charges for account B  is

0.12x + 14

(2) To find number of checks write per month for the accounts to charge the same in fees

WE set both expression , account A = account B

0.08x + 16=0.12x + 14

Subtract 0.12x on both sides

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Now subtract 16 on both sides

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Answer:

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Step-by-step explanation:

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3 years ago
(60 points to best answer) (asap please and thank you)
inna [77]

Answer: 83.\overline{3}\text{ feet}

Step-by-step explanation:

Since, In the given diagram,

The sides of the triangles ABC and EDC are,

BC = 62 feet, DC = 93 feet and DE = 125 feet(given)

And, angles B and D are right angles,

⇒ \angle ABC\cong \angle EDC

\text{Also, } \angle ACB\cong \angle ECD    ( Vertically opposite angles )

By AA similarity postulate,

\triangle ABC\sim \triangle EDC

The sides of similar triangles are in same proportion ,

⇒  \frac{AB}{ED}=\frac{BC}{DC}

⇒  AB \times DC = BC \times ED

⇒  AB = \frac{BC.ED}{DC}

By substituting the values,

We get,

⇒  AB = \frac{62\times 125}{93}

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