All categories

3 years ago

3. Which expression is a simplified form of 3x2 - 4x + 5 – x2 + 2x - 1?

Mathematics

1 answer:

Sphinxa [80]3 years ago

7 0

Answer:

Option a

Step-by-step explanation:

Adding them, you get 2x²-2x+4

Answered by GAUTHMATH

You might be interested in

What is the midpoint of (-2,-5) and (-6,3)? What quadrant is it in?

babunello [35]

Midpoint is (-4, -1) in the 3rd quadrant

5 0

3 years ago

Which numbers are solutions to the inequality x < −7, using the replacement set {−15, −10.5, −7.2, −7, 0}?

slamgirl [31]

Find all the number in the set that are less than -7.

The 'bigger' the negative number seems, the smaller it is.

So -15, -10.5, and -7.2 are all less than -7.

4 0

3 years ago

Read 2 more answers

Find the range of f(x) = –x + 4 for the domain {–3, –2, –1, 1}.

marishachu [46]

Answer:

$\boxed{ \{7, 6, 5, 3 \} }$

Step-by-step explanation:

The domain is all possible values for x.

The range is all possible values for f(x) or y.

The domain given is {-3, -2, -1, 1}.

Plug x as {-3, -2, -1, 1} and find the f(x) or y values.

$f(-3)=-(-3)+4=7\\f(-2)=-(-2)+4=6\\f(-1)=-(-1)+4=5\\f(1)=-(1)+4=3$

The range is {7, 6, 5, 3}, when the domain is {-3, -2, -1, 1}.

5 0

3 years ago

For the rectangle shown, which equation can be used to find the value of x?

trasher [3.6K]

Answer:

Pythagorean theorem $a^{2} +b^{2} =c^{2}$

Step-by-step explanation:

$a^{2} +b^{2} =c^{2} \\x^{2} +3.6^{2} =7.4^{2} \\x^{2} +12.96=54.76\\x^{2} =\sqrt{41.8} \\x=6.47\\$

6 0

3 years ago

What is the value of x?

Lerok [7]

Answer:

3√2

Step-by-step explanation:

The hypotenuse of an isosceles right triangle is √2 times the side length.

x = 3√2

_____

All these triangles are similar, so the ratio of hypotenuse to leg is the same for all.

hypotenuse/leg = x/3 = (3+3)/x

x² = 3·6 = 3²·2 . . . . cross multiply (identify square factors)

x = 3√2 . . . . . take the square root

7 0

3 years ago