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lukranit [14]
3 years ago
7

a teacher awarded 50 marks to his least student in a class test. How many marks was awarded to the best student if he was 40% be

tter​
Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

90 marks per that student

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Lines AC←→ and DB←→ intersect at point W. Also, m∠DWC=138° .
mr_godi [17]

m∠DWC=138°, ∠AWB = 138°, ∠AWD = 42°, ∠BWC = 42°

Solution:

Line \overrightarrow{A C} \text { and } \overrightarrow{B D} intersect at a point W.

Given m \angle D W C=138^{\circ}.

<em>Vertical angle theorem:</em>

<em>If two lines intersect at a point then vertically opposite angles are congruent.</em>

<u>To find the measure of all the angles:</u>

∠AWB and ∠DWC are vertically opposite angles.

Therefore, ∠AWB = ∠DWC

⇒ ∠AWB = 138°

Sum of all the angles in a straight line = 180°

⇒ ∠AWD + ∠DWC = 180°

⇒ ∠AWD + 138° = 180°

⇒ ∠AWD = 180° – 138°

⇒ ∠AWD = 42°

Since ∠AWD and ∠BWC are vertically opposite angles.

Therefore, ∠AWD = ∠BWC

⇒ ∠BWC = 42°

Hence the measure of the angles are

m∠DWC=138°, ∠AWB = 138°, ∠AWD = 42°, ∠BWC = 42°.

7 0
3 years ago
Simplify the expression.
Doss [256]
Distribute 6 thru the parenthesis=

198 pie plus 6 pie

Factor out the perfect square=
Pie 3 to the second power times 22 plus 7 pie 6

Calculate the square root =

3 pie 22 plus 7 pie 6

Which equals to 31.2177

5 0
3 years ago
HELP ME SOMEONE PLEASE :(
Lemur [1.5K]

Answer: The answer is A.

Step-by-step explanation:

The formula for the area of circles:

A = πr^2

Plug in the radius

A = π8^2

A = π64

A = 201.06192983/ 201 (rounded)

3 0
2 years ago
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Andre draws a tape diagram for 3÷2/3
bija089 [108]

Answer:

No I do not agree with Andre says that 3 divided by 2/3 Solving for 3 ÷ 2/3

3 ÷ 2/3

= 3 × 3/2

= 9/2

= 4 1/2

Therefore, 3 divided by 2/3 is 4 1/2

Andre's reasoning is wrong.

Step-by-step explanation:

It is incorrect

Let's divide and compare the sum

3 : 2/3 = 3*3/2 = 9/2 = 4 1/2

and

There are four 2/3 fractions and one 1/3 fraction

The 1/3 fraction is 1/2 of 2/3 fraction so instead of counting 1/3 as 1/3 it should be counted as 1/2

4 0
2 years ago
The picture shows the graphs of the functions expressed by a formula of the following type: y = kx + b.
Mademuasel [1]

Answer:

1. k=1,  b=1

2. k=-1, b=-0.5

Step-by-step explanation:

7 0
3 years ago
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