Предмет: Геометрия, автор: Alex89032

Если сторону квадрата увеличить на 10% то его площадь увеличится на 47,25см2.
Вычисли сторону квадрата и его площадь до увеличения. Cрочно

Ответы

Автор ответа: Toranda
0
Площадь кв -х.. Площадь кв2 - х+47.25.. Сторона кв - у.. Сторона кв2 - у*0.1+у=1.1*у.. у^2=х, тогда... 1.1у*1.1у=х+47.25.. 1.21*у^2=у^2+47.25.. 0.21у^2=47.25.. у^2=225.. у=15 - сторона кв.. Площадь кв = 15*15=225 см^2.
Похожие вопросы
Предмет: Английский язык, автор: polin252
ПРОШУ ПОМОГИТЕ ПОЖАЛУЙСТА!!!!

Complete the sentences with the third conditional form of the verbs in brackets. If I _______________ (think) more carefully about what I would do after university, I _______________ (not study) Art History. *


Complete the sentences with the third conditional form of the verbs in brackets. If you _______________ (not see) the advert, _______________ (buy) the product? *


Complete the sentences with the third conditional form of the verbs in brackets. He _______________ (phone) his girlfriend if he _______________ (know) how worried she would be. *


Complete the sentences with the third conditional form of the verbs in brackets. If she _______________ (not miss) that flight, she _______________ (not be) late for the wedding. *


Complete the sentences with the third conditional form of the verbs in brackets. We _______________ (encourage) him to find a different job if we _______________ (realised) how unhappy he was. *


Use the prompts to write third conditional sentences. if / I / not steal / the money / I / not go / to prison *


Use the prompts to write third conditional sentences. if / they / know / about his criminal history / they / not give / him / a job *


Use the prompts to write third conditional sentences. you / not buy / that soft drink / if / you / not see / an advert for it *


Use the prompts to write third conditional sentences. if / we / buy / everything / in the winter sale / we / save / a lot of money *


Use the prompts to write third conditional sentences. how sad / you / feel / if / he / leave / the country / without telling you? *


Предмет: Математика, автор: arinabagaeva0