Question

Bantu kerjakaan 1-5yh

Answer 1

"Nomor 1"
10 - (-15 : 3) + (-4) x (-5)
= 10 - (-5) + 20
= 10 + 5 + 20
= 35
(Opsi D)

"Nomor 2"
Diketahui:
Panjang (p) : Lebar (l) = 7 : 5
K = 72 cm

Ditanya : Luas (L) ?

Jawab:
Panjang (p) = 7/5l
Lebar (l) = 5/7p

•Cari panjang dan lebar•
K = 2 (p + l)
72 = 2 (p + 5/7p) →samakan penyebut
72 = 2 (7/7p + 5/7p)
72 = 2 (12/7p)
72 = 24/7p
p = (72 x 7) / 24
p = 21 cm

Maka , didapat :
•Panjang = 21 cm
•Lebar Persegi Panjang :
= 5/7p
= 5/7 x 21 cm
= 15 cm

Jadi,
Luas persegi panjang tsb :
= p x l
= 21 cm x 15 cm
= 315 cm²
(Opsi C)

"Nomor 3"
20 hari <=> 200 ekor ayam
x ........? <=> (200 + 500 ) ayam

•Menggunakan Perbandingan Berbalik Nilai •
→ x /20 = 200/ (200 + 50)
→ x /20 = 200/250
→ x /20 = 4/5
→ 5x = 20 x 4
→ x = (20 x 4) / 5
→ x = 16 hari
(Opsi A)

"Nomor 4"
√2 x √3 x √48 : 6√2
→ √6 x (√16 x √3) : 6√2
→ √6 x 4√3 : 6√2
→ 12√2 : 6√2
→ 4
(Tidak ada yg sesuai dg opsi)

"Nomor 5"
64^2/3 : 16^3/4
→ (2^6)^⅔ : (2⁴)^¾
→ 2^4 : 2^3
→ 16 : 8
→ 2
(Opsi A)

*Maaf apabila ada yang salah"