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adelina 88 [10]
2 years ago
8

I need help with this question

Mathematics
1 answer:
MariettaO [177]2 years ago
6 0
You would move the decimal two places to the left
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How do you write 2.78 as a percentage?
natta225 [31]

Answer:To convert from decimal to percent, just multiply the decimal value by 100. In this example we have: 2.78 × 100 = 278%

Step-by-step explanation: And thats how ya do it its 278%

4 0
3 years ago
Read 2 more answers
O is the centre of the circle, EF is a tangent, angle BCE = 28°, angle ACD = 31°
andriy [413]

Answer

a. 28˚

b. 76˚

c. 104˚

d. 56˚

Step-by-step explanation

Given,

∠BCE=28°  ∠ACD=31°  &  line AB=AC .

According To the Question,

  • a. the angle between a chord and a tangent through one of the end points of the chord is equal to the angle in the alternate segment.(Alternate Segment Theorem) Thus, ∠BAC=28°

  • b. We Know The Sum Of All Angles in a triangle is 180˚, 180°-∠CAB(28°)=152° and ΔABC is an isosceles triangle, So 152°/2=76˚

        thus , ∠ABC=76° .

  • c. We know the Sum of all angles in a triangle is 180° and opposite angles in a cyclic quadrilateral(ABCD) add up to 180˚,

Thus, ∠ACD + ∠ACB = 31° + 76° ⇔ 107°

Now, ∠DCB + ∠DAB = 180°(Cyclic Quadrilateral opposite angle)

∠DAB = 180° - 107° ⇔ 73°

& We Know, ∠DAC+∠CAB=∠DAB ⇔ ∠DAC = 73° - 28° ⇔ 45°

Now, In Triangle ADC Sum of angles in a triangle is 180°

∠ADC = 180° - (31° + 45°)  ⇔  104˚

   

  • d. ∠COB = 28°×2 ⇔ 56˚ , because With the Same Arc(CB) The Angle at circumference are half of the angle at the centre  

For Diagram, Please Find in Attachment  

4 0
3 years ago
Two lines, A and B, are represented by the equations given below:
Vikki [24]
Ok so to be a solution of both, it mus satisfy both equations

therefor only the first choice is correct because (the following is why the other answers are wrong)
2. solutions can lie on axises
3. it mus satisfy both equations
4. it can lie on or between the axises


answer should be the fist one
4 0
4 years ago
Read 2 more answers
What is n?<br> No links!! I repeat NO links
rewona [7]

Answer:

180 = 70 +80 +n

n = 30

Step-by-step explanation:

good luck have a nice day

4 0
3 years ago
Read 2 more answers
Solve for the value of d.
serg [7]

Answer:

d is 9

Step-by-step explanation:

(6d+8) + (3d+1)=90

9d +9=90

9d=90-9

9d =81

d=81/9

d is 9

5 0
3 years ago
Read 2 more answers
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