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2 years ago

2Find the perimeter and area of this shape.1 cmNOT TOSCALE6 cm1 cm9 cm

Mathematics

1 answer:

kherson [118]2 years ago

4 0

Step-by-step explanation:

circumference=πd

22/7×4

12.57

perimeter=12.57+9+9+2+6

= 38.57

area=6×9=54

1/2πr2

1/2×22/7×4×4

=25.14

54-25.14

area=28.86cm2

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0.9 of Karen's Science score is equal to 0.75 of her Math score and 0.8 of her Chemistry score. Given that Karen scored 96 marks

DochEvi [55]

You have to formulate equations for this problem.

Let S = Science score

M = Math score

C = Chemistry score

To illustrate the given:

0.9S = 0.75M

0.9S = 0.8C

You are given that Karen’s Math score is 96 marks. You have to substitute the Math score to the first equation.

0.9S = 0.75(96)

0.9S = 72

S = 80

Therefore, Karen’s Science score is 80. Now, you have to substitute the Science score to the second equation.

0.9(80) = 0.8C

0.8C = 72

C = 90

So, Karen’s Chemistry score is 90.

Therefore, the total score of the 3 subjects is 266 (96 + 80 + 90).

5 0

3 years ago

Convert 11.42424242 to a rational expression in the form of a/b , where b ≠ 0.

TiliK225 [7]

11.424242
isolate the repeating part
11+0.424242

focus on the repeating part
0.42424242
how many places till it repeats again?
2
let's say it is x
x=0.42424242
multiply by 100
100x=42.424242

subtract them
100x-x=42.42424242-0.42424242
the infinite repeats cancel and we get
99x=42
divide by 99
$x=\frac{42}{99}$

so
$11.\overline{42}=11 \space\ \frac{42}{99}$

5 0

3 years ago

Read 2 more answers

Please help would mean a lot

jarptica [38.1K]

Answer:

1/2

Step-by-step explanation:

output devided by input

3 0

2 years ago

Best explained and correct answer gets brainliest!!

velikii [3]

The equation is
(y-7)/x=6
y-7=6x
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5 0

3 years ago

Read 2 more answers

Simplify the following expression.

zimovet [89]

Answer:

B. 51

Step-by-step explanation:

first do inside the parenthesis

83 - 4 * (6-4)^3 = 83 - 4 * (2)^3

now multiply 4 and the third power of 2 (the third power of 2 is 2x2x2=8)

83 - 4 * (2)^3 = 83 - 32 subtract and the answer is 51

7 0

3 years ago

2Find the perimeter and area of this shape.1 cmNOT TOSCALE6 cm1 cm9 cm​

2Find the perimeter and area of this shape.1 cmNOT TOSCALE6 cm1 cm9 cm