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3 years ago

Which of the following expressions is correct?

Mathematics

2 answers:

Andreyy893 years ago

5 0

Answer:

the first one

Step-by-step explanation:

the negative sign is in the box

Amiraneli [1.4K]3 years ago

4 0

Answer:

The first one is correct

Step-by-step explanation:

Absolute value (Anything that is inside the tabs) will always be positive, even if there is a negative sign in the number. If the number is already positive, it's still positive.

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Find m<1 and find m<2

xenn [34]

Answer:

m∠1 = 50°

m∠2 = 130°

Explanation:

m∠2 = 130° because of alternate exterior angles.

m∠1 = 50° because it is supplementary to m∠2. So, 180 - 130 = 50.

8 0

3 years ago

Three students were given the expression shown to simplify.

koban [17]

2-21x+28
-21x +3
Hope it helps

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3 years ago

Good afternoon mates

klemol [59]

Answer:

Afternoon has never been good tho...

Step-by-step explanation:

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2 years ago

A survey indicated that 2 out of 4 doctors used brand X aspirin. If 1000 doctors used brand X, how many doctors were surveyed? P

Ratling [72]

We can set this up as a proportion.

Since 2 is proportional to 1000, then 4 is proportional to "doctors surveyed".

$\frac{2}{4} = \frac{1000}{d}$ where d is the doctors surveyed.

Cross multiply.

2d = 4000
d=2000

2000 doctors were surveyed.

8 0

3 years ago

Solve the quadratic equation using factoring x^2 + 3x + 2 = 0.

Sedaia [141]

Answer:

Step-by-step explanation:

Given

x² + 3x + 2 = 0

To factor the quadratic

Consider the factors of the constant term (+ 2) which sum to give the coefficient of the x- term (+ 3)

The factors are 2 and 1, since

2 × 1 = 2 and 2 + 1 = 3, thus

(x + 2)(x + 1) = 0

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

x + 1 = 0 ⇒ x = - 1

5 0

2 years ago