The mass of a dictionary is 1.28 kg. The mass of the dictionary is twice the mass of a storybook. The mass of an encyclopaedia is 1.4 kg more than storybook. What is the mass of the encyclopaedia?
1. The mass of a dictionary is 1.28 kg. The mass of the dictionary is twice the mass of a storybook. The mass of an encyclopaedia is 1.4 kg more than storybook. What is the mass of the encyclopaedia?
Jawaban:
2.04 kg
Penjelasan dengan langkah-langkah:
Jika berat sebuah kamus 2 kali berat buku cerita, maka berat buku cerita adalah setengah dari berat kamus. Sehingga berat ensiklopedia adalah
1.4 kg + (1.28 ÷ 2) kg
= 1.4 kg + 0.64kg
= 2.04 kg
2. the mass of a watermelon is 7/1 kg. the mass of a apples is 2/5 kg less than the mass of the watermelona. what is the mass of the applesb.what is the total mass of the apples and watermelon
Diketahui:
Berat semangka = 7/1 kg
Berat apel = 2/5 kg kurang dari semangka
Maka:
a. Berat apel = 7/1 - 2/5
= 35/5 - 2/5
= 33/5 = 6 3/5
b. Berat apel dan semangka = 7/1 + 6 3/5
= 35/5 + 33/5
= 68/5 = 13 3/5
Maaf klo salah
Semoga membantu
Jadikan jawaban terbaik ya...
3. A kitten and a basket has a mass of 3 kg. A hanster and a similar basket has a mass of 1.4 kg. The mass of the kitten is 5 times the mass of the hamster. (a) what is the mass of the hamster? (b) what is the mass of the kitten?
hamster = x
kitten =y
basket=z
y=5x
x + z = 1,4
y+ z = 3. (+)
x-y = -1,6
x-5x=-1,6
6x = 1,6. x =0,267
y = 5x=5×0,267=1,335
4. The total mass of a basket and some papayas is 21 kg. The total mass of the same basket and some apples is 11 kg. The mass of the papayas was twice the mass of the apples. What is the mass of the papaya?
Jawaban:
20 Kg
Penjelasan dengan langkah-langkah:
Basket And Papayas = 21 kg
Basket And Apples = 11 Kg
Basket = 1 Kg
21+11=32
32-2 [2=Mass Basket] = 30
there are 2 basket = [2:2=1]
21 - 1 = 20 = Mass Papayas
11 - 1 = 10 = Mass Apples
5. A box on Earth has weights 750 N. The mass of the box on Earth (g= 10 N/Kg) is
weight formula :
w = m x g
w = weight (n)
m = mass (kg)
g = gravity acceleration (10m/s or 10n/kg)
answer :
w = m x g
750 = m x 10
m = 750/10
m = 75 kg
thus, the mass of the box on earth is 75 kg
6. The total mass of a basket and a rock melon was 3.78 kg. When a pomelo was added into the basket, the total mass became 5.42 kg. The mass of the rock melon was twice the mass of the pomelo. What was the mass of the rock melon?
5.42-3.78=1.64
1.64×2=3.28so the mass of the rock melon was 3.28
[tex] \textit{Basket and Melon} = 3,78 \, kg [/tex]
[tex] \textit{Basket, Melon, Pomelo} = 5,42 \, kg [/tex]
[tex] \textit{Melon} = 2 \textit{Pomelo} [/tex]
[tex] \textit{Basket, Melon, Pomelo} - \textit{Basket and Melon} = 5,42 - 3,78 [/tex]
[tex] \textit{Pomelo} = 1,64 \, kg [/tex]
[tex] \textit{Melon} = 3,28 \, kg [/tex]
7. The mass of a bag of potatoes is 2.3 kg. What is the total mass of 6 such bags of potatoes?
Jawaban:
The mass of a bag of potatoes is 2.3 kg. What is the total mass of 6 such bags of potatoes?
2,3 kg x 6 = 13,8kg
Maaf kalo salah
8. a tin contains three types of cookies. The mass of Type A cookies is 1 2/9 kg. The mass of Type B cookies is 2 5/6 kg. The total mass of the three types of cookies is 5 kg. What is the mass of Type C cookies?
Penjelasan dengan langkah-langkah:
satu kaleng berisi tiga jenis kue. Massa cookie Tipe A adalah 1 2/9 kg. Massa kue Tipe B adalah 2 5/6 kg. Massa total ketiga jenis cookies tersebut adalah 5 kg. Berapa massa cookie Tipe C?
5 - ( 1 2/9 + 2 5/6)
5 - (11/9 + 17/6)
5 - (22/18 + 51/18)
5 - 73/18
5/1 - 73/18
90/18 - 73/18
17/18
9. The mass of an Encyclopaedia is 1.05 kg. The mass of the encyclopaediais thrice the mass of a storybook.The mass of a dictionary book is 0.72 kgmore than the storybook. What is the mass of the dictionary bookuse working
Jawaban:
Massa sebuah Ensiklopedia adalah 1,05 kg. Massa ensiklopedia adalah tiga kali massa buku cerita. Massa buku kamus adalah 0,72 kg lebih dari buku cerita. Berapa massa buku kamus?
Massa ensiklopedia = 1.05 kg
Massa buku cerita = ⅓ massa buku ensiklopedia
cara — ⅓ x 1,05 = 0,35 kg
Massa kamus = massa buku cerita + 0,72 kg
cara — 0,35 + 0,72 = 1,07 kg
semoga membantu
jadikan jawaban terbaik ya..
10. a tin contains three types of cookies. The mass of Type A cookies is 1 2/9 kg. The mass of Type B cookies is 2 5/6 kg. The total mass of the three types of cookies is 5 kg. What is the mass of Type C cookies? (5 marks
Penjelasan dengan langkah-langkah:
the mass of type C cookies
= 5 kg - 1 ²/9 kg - 2 ⁵/6 kg
= 5 kg - ¹¹/9 kg - ¹⁷/6 kg
= ¹⁸⁰/36 kg - ⁴⁴/36 kg - ¹⁰²/36 kg
= ³⁴/36 kg
= ¹⁷/18 kg
11. The average mass of 9 sheep is 35 kg. The average mass of 9 sheep and 1cow is 64 kg. What is the mass of the cow?
Jawaban:
The mass of the cow is 325kg
Penjelasan:
TobeKnown:
9 sheep = 35 kg
9 sheep + 1 cow = 64 kg
TobeAsked:
mass of the cow = . . . . ?
Solving:
as 9 sheep + 1 cow is 64 kg, so that the total average mass of those 10 animals = 64 kg
total average = [tex]\frac {(9 × 35) + (cow)}{10}[/tex] = 64
(315) + (cow) = 64 × 10
315 + cow = 640
cow = 640 - 315
cow = 325 kg
12. A bag of grapes has a mass of 4.55 kg. A bag of mangoes has a mass of16.90 kg. What is the total mass of the two bags of fruits?
Jawaban:
total mass = grapes mass + mangoes mass
total mass = 4.55 kg + 6.90 kg
total mass = 11.45 kg
13. A basket with 65 sweets has a mass of 3200 g The same basket with40 sweets has a mass of 2125 g Each sweet has the same massWhat is the mass of the basket?tolong
Jawaban:
405 g
Penjelasan:
If the mass of each sweet is M and the mass of the basket is B, then you have two equations in two unknowns that can be solved as linear equations.
65M + B = 3200
40M + B = 2125
Subtract the second equation from the first one to get:
25M = 1075
M = 1075 / 25
M = 43
Substitute the value of M into the first equation to get:
65M + B = 3200
65(43) + B = 3200
2795 + B = 3200
B = 405
Check by putting both values into the second equation:
40(43) + 405 = 2125
1720 + 405 = 2125?
2125 = 2125
Correct
CMIIW
14. The mean mass of five boys is 62 kg. When the mass of a boy is excluded, the mean mass of the remaining four boys becomes 64 kg. Find the mass of the boy that has been excluded.
Penjelasan dengan langkah-langkah:
Let the mass of the excluded boy be "x".
The mean mass of the five boys is 62 kg, so the total mass of the five boys can be expressed as 5 * 62 = 310 kg.
And, the mean mass of the remaining four boys after excluding the one boy is 64 kg, so the total mass of the remaining four boys can be expressed as 4 * 64 = 256 kg.
So, we have the equation: 310 - x = 256 + x,
Solving for x: x = (310 - 256)/2 = 27 kg.
So, the mass of the excluded boy is 27 kg.
Jawaban:
the answer is 54 kg, sorry for messy handwriting
15. a kitten and a basket has a mass of 3 kg . A hamster and a similar basket has a mass of 1.4kg . the mass of the kitten is 5 times the mass of the hamster .a. what is the mass of the hamster ? , b. what is the mass of the kitten ?
kitten = x ,hamster = y and baskest = z
x+z = 3 kg
y+z = 1,4 kg
z = x- y = 3 kg - 1,4 kg = 1,6 kg
x+y = 4,4 kg - 1,6 kg = 2, 8 kg
x = 5y
5y +y = 2,8 kg
6y = 2,8 kg
y = 2,8 kg /6
y = 0,47 kg
x = 5y
= 5 * 0,47 kg
= 2,35 kg
a. mass off hamster = 0,47 kg
b. mas off kitten = 2,35 kg
bonus...mass of basket = 1,6 kg
thank's
16. The average mass of 2 chairs is 12 kg. The mass of one of the chairs is 9 kg. What is the mass of the other chair?
Jawaban:
15kg
Penjelasan dengan langkah-langkah:
[tex]12 = \frac{9 + x}{2} \\ 9 + x = 12 \times 2 \\ 9 + x = 24 \\ x = 24 - 9 \\ x = 15[/tex]
Semogamembantu!
Jawaban:
the mass of the other chair is 15 Kg
Penjelasan dengan langkah-langkah:
Diketahui : average (rata-rata) mass of 2 chair 12 Kg
The mass of one of the chairs is 9 Kg
the mass of the other chair = x
[tex] \frac{9 + x}{2} = 12 \\ x = 15[/tex]
17. When an astronaut stands on a weighing scales on Earth, they read 60 kg. The astronaut travels to planet X which has half the gravitational force of the Earth. a What is the astronaut's mass on Earth? b What is her weight on Earth? c What is her mass on planet X? d What is her weight on planet X? Describe four ways in which the picture shows the effects of forces on objects.
answer:
a.30kg
b.60newton
c.30kg
d.30newton
18. 1. A bag of grapes has a mass of 4.55 kg. A bag of mangoes has a mass of 6.90 kg. What is the total mass of the two bags of fruits? *
Jawaban:
4.55 + 6.90 = 11.45
Penjelasan:
sorry if it's wrong, hope it helps^^
Jawaban:
4,55 + 6,90 = 11,45
Penjelasan:
total mass of the two bags of fruits is 11,45 kg
19. The mass of a bag of rice is 3 times the mass of a bag of fruits. If the mass of the bag of the rice is 15 kg, find the mass of the bag of fruits. (please put the calculation)
Jawaban:
5kg
Penjelasan dengan langkah-langkah:
Mass of bag of rice : 3 = Mass of bag of fruit
15 : 3 = 5
Jawaban:
5 kilograms
Penjelasan dengan langkah-langkah:
15 divided by 3 equal to 5
because the weight of the bag of rice is 3 times the weight of the bag of fruit, so the weight of the bag of fruit is the weight of the bag of rice divided by three
gak tau mau ngomong apa lagi
20. 23.A watermelon has a mass of 12.78 kg. Its mass is thrice the mass of a papaya. Find thetotal mass of the two fruits.
Jawaban:
mtk atau b inggris sih:)
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