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jekas [21]
4 years ago
12

Bill wrote this expression in his notebook.

Mathematics
2 answers:
klasskru [66]4 years ago
7 0

B. 10- 4 +3 x (18-9)

Ghella [55]4 years ago
5 0
Bill should put the brackets around 18-9 so the correct answer is option B. 10- 4 +3 x (18-9)
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Sony brother is 8 year older than four fifth her age. if her brothers age is 32 years what is sony
madam [21]

Answer:

I would say Sony's age is 33 because 4/5 of 32 is about 25 then 25+8=33

Hope I helped :)

3 0
3 years ago
How many tens are in 100
soldier1979 [14.2K]
There are 10 tens in 100
4 0
3 years ago
Read 2 more answers
Prove each of these identities.
Stella [2.4K]

Answer:

Identity (a) can be re-written as

sec x\ cosec x  - cot x = tan x

which we already proven in another question, while for idenity (b)

(A)\frac 1 {sin x} -sin x = cos x \frac{cos x}{sin x}\\\\(B)\frac {1-sin^2x}{sin x} = \frac {cos^2x} {sin x} \\\\(C) \frac {cos^2x}{sin x} =\frac {cos^2x} {sin x}

step A is simply expressing each function in terms of sine and cosine.

step B is adding the terms on the LHS while multiplying the one on RHS.

step C is replacing the term on the numerator with the equivalent from the pithagorean identity cos^2x  + sin^2x = 1

8 0
2 years ago
X^2-5x=-4 . I need to find the zeroes
GrogVix [38]
The zeros of a quadratic equation are equal to the x-intercepts of its graph. In other words, you must find the x-value that causes the expression to equal zero. Start by adding 4 to both sides of the equation:

X² - 5x + 4 = 0

Factor the equation:

(x - 1)(x - 4) = 0

Now calculate each piece separately, starting with the first one:

x - 1 = 0

Add 1 to both sides of the equation:

x = 1

We have proven that x = 1. Now calculate the second piece:

x - 4 = 0

Add 4 to both sides of the equation:

x = 4

We have proven that x = 4. Consequently, we have proven that (x = 1) and (x = 4) are the two zeros of this quadratic equation.

I hope this helps!
4 0
4 years ago
Solve: 1/5x = -10 A) -50 B) -20 C) -2 D) 2
Ede4ka [16]

Answer: A. x= -50

Step-by-step explanation:

1/5x = -10

<u>  1  </u>= -10

5x

1.1 = 5x. (-10)

- 50x  

x= -50

6 0
4 years ago
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