beserta caranya. besok di kumpulkan

Mapel : Matematika

No. 1
= -10 + [24 ÷ (-2)] × 2
= -10 + (-12) × 2
= -10 + (-24)
= - 34................Jawaban (A)

No. 2
[tex]Kell=2(P+L)\\\\Kell=2(20 \frac{1}{4} + \frac{13}{2} )\\\\Kell=2(\frac{81}{4} + \frac{13}{2} )\\\\Kell=2(\frac{81}{4} + \frac{26}{4} )\\\\Kell=2(\frac{107}{4})\\\\Kell=107\div2\\\\Kell=53,5 \approx 53 \frac{1}{2}................Jawaban\ (C) [/tex]

No. 3
x₁ = 4
x₂ = (4 + 2) = 6
y₁ = 24

[tex] \frac{x_1}{y_2}= \frac{x_2}{y_1}\\\\ \frac{4}{y_2}= \frac{6}{24}\\\\y_2= \frac{4\times24}{6}\\\\y_2=4\times4\\\\y_2=16\ ....................\ Jawaban\ (B) [/tex]

No. 4
[tex]=(-3)^{-4}\\\\=\frac{1}{(-3)^4}\\\\=\frac{1}{81}\ ................. \ Jawaban\ (C)[/tex]

No. 5

[tex]=-2 \sqrt{7} \times (-4 \sqrt{7})\\=(-2 \times -4)\times( \sqrt{7} )^2 \\=8\times7\\=56 ............................. Jawaban\ (D)[/tex]

No. 6

[tex]= \frac{8}{3+ \sqrt{5}}\\\\= \frac{8}{3+ \sqrt{5}} \times\frac{3- \sqrt{5}}{3- \sqrt{5}}\\\\= \frac{8(3- \sqrt{5})}{(3+ \sqrt{5})(3- \sqrt{5})}\\\\= \frac{8(3- \sqrt{5})}{3^2- (\sqrt{5})^2}\\\\= \frac{8(3- \sqrt{5})}{9-5}\\\\= \frac{8(3- \sqrt{5})}{4}\\\\=2(3- \sqrt{5})\\=6-2\sqrt{5}..............Jawaban\ (C)[/tex]

No. 7
Bunga setelah 6 bulan
= 1.836.000 - 1.800.000
= 36.000

[tex]Nilai\ Bunga = \frac{n}{12}\times (\frac{Suku\ Bunga\ 6\ bulan}{100\%})\times(Pokok) \\\\36.000 = \frac{6}{12}\times(\frac{Suku\ Bunga\ 6\ bulan}{100\%})\times1.800.000\\\\36.000 = \frac{1}{2}\times(\frac{Suku\ Bunga\ 6\ bulan}{100\%})\times1.800.000\\\\36.000 =(\frac{Suku\ Bunga\ 6\ bulan}{100\%})\times900.000\\\\Suku\ Bunga\ 6\ bulan=\frac{36.000}{900.000}\times100\%\\\\Suku\ Bunga\ 6\ bulan=\frac{4}{100}\times100\%\\\\Suku\ Bunga\ 6\ bulan=4\%\\\\Suku\ Bunga\ 1\ tahun=2\times4\%=8\%....Jawaban\ (C)[/tex]

Soal No. 8
(maaf untuk nomor ini, saya belum bisa. coba posting pertanyaan khusus yang nomor ini, mungkin ada user lain yang bisa bantu)

***Semoga Terbantu***