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# Emma is taking a 80 item test. she knows the correct answers to all but 1/4 of the items. if she guesses correctly 2/5 of these questions, how many correct answers in all will she get? ​

• Réponse publiée par: molinamaureen080693

=68 cause if you divide 80 to 1/4 it is 20 and if you divide 20 to 2/5 it is 8 so 60 plus 8 is 68

• Réponse publiée par: kurtiee

34 questions

Step-by-step explanation:

172 marks is his scores

5 marks is an award

2 marks will be deducted for wrong answers

So, we subtract 2 from 172 and divide it by 5 to get the answer which is 34.

• Réponse publiée par: rhaineandreirefuerzo

6. B

7. D

Explanation:

6. Because Oxygen is an element and water is compound of Hydrogen and Oxygen

7. Oxygen is an element same as iron which is true and Protein and sugar is  elements which is NOT true because they are compounds.

• Réponse publiée par: kateclaire

1.C -The ribs are the bony framework of the thoracic cavity. The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration.

2.D. The muscular system and skeletal system work together closely to make movement possible.

3.B. The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals. The skeletal system is also called the musculoskeletal system.

4.D. Cartilage and Bone are specialised forms of connective tissue. They are both made up of cells embedded in an extracellular matrix. ... Cartilage is thin, avascular, flexible and resistant to compressive forces. Bone is highly vascularised, and its calcified matrix makes it very strong.

5.B. Ligaments - a tough band of tissue that holds the ends of bones together at a joint Joints - where two or more bones meet together Tendons - cords of connective tissue that attach muscle to bone Muscles and tendons attach to bones on either side of a joint, holding the bone(s) together tightly In the human body.

6.D. The clavicle supports the scapula, transmits the weight and forces from the upper limb to the body trunk, and protects the underlying nerves and blood vessels. The scapula lies on the posterior aspect of the pectoral girdle.

7.B. or C. The ribs are connected to the sternum with a strong, somewhat flexible material called cartilage. The rib cage help protects the organs in the chest, such as the heart and lungs, from damage.

8.A.

9.B. Carpal bones in the wrist

Carpal bones in the wristYour wrist is made up of eight small bones called the carpal bones, or the carpus. These join your hand to the two long bones in your forearm — the radius and ulna.

10.A. The human skull is the bony structure that forms the head in the human skeleton. It supports the structures of the face and forms a cavity for the brain. Like the skulls of other vertebrates, it protects the brain from injury.

PLEASE DO NOT REPORT MY ANSWERS IT IS REALLY HARD TO ANSWER THIS BUT I TRY MY BEST, IF YOU WANNA REPORT IT TELL ME THE THE PROBLEM SO I CAN EDIT MY ANSWERS TYSM❣️

• Réponse publiée par: snow01

4 questions

Step-by-step explanation:

Ang 100% ay 20 questions

10% is 2

20% is 4

30% is 6

40% is 8

50% is 10

60% is 12

70% is 14

80% is 16

90% is 18

100% is 20

80%+20%=100%

16 + 4 =20

• Réponse publiée par: maledabacuetes

di ko alam yan

Step-by-step explanation:

• Réponse publiée par: batopusong81

c

b

a

Explanation:

• Réponse publiée par: reyquicoy4321

If Brian=Damien so therefore the number of questions Chris answered correctly 2 greater than Damien score.

• Réponse publiée par: pauyonlor

mali po yung number 9 tapos yung 10 lang po yung tama

Explanation:

english to tagalog

• Réponse publiée par: ian2145

None of the answers are right

Step-by-step explanation:

Let number of questions be correct answered by Brian be x

Let number of questions be correct answered by Chris be y

Let number of questions be correct answered by Damien be z

0 <= x <= 20, 0 <= y <= 20, 0 <= z <= 20

x - 14 = y then x >= 14

z + 2 = y,  then z <= 18

Now Brian and Damien have got same score.

Problem doesn't tell if all questions have same marks

(x != z)

Put x = 17 u get y = 3 and z = 1

Put x = 18 u get y = 4 and z = 2

Put x = 19 u get y = 5 and z = 3

Put x = 20 u get y = 6 and z = 4

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Emma is taking a 80 item test. she knows the correct answers to all but 1/4 of the items. if she gue...