3 years ago

Simplify the following expressions and then find the numerical values for x = -2.

Mathematics

1 answer:

galina1969 [7]3 years ago

5 0

Step-by-step explanation:

for the given value x = -2

= 3(2x-4) + x^2 +5

= 3(-4 -4) +4+5

= -24+9

= -15

You might be interested in

Solve the given proportion x/6=6/9

likoan [24]

hope this will help u.....

5 0

3 years ago

A triangle has side lengths of 26 in., 12 in., and 18 in. Is this triangle acute, right or obtuse? Explain your answer.

kondor19780726 [428]

Answer:

obtuse

Step-by-step explanation:

12^2+18^2=26^2

144+324=676

468=676

if it was over 676 it would be acute if it equaled 676 it would be a right triangle

7 0

3 years ago

Please help me and explain to me!

Vadim26 [7]

I believe the answer is 19.2 because you would have to do paythag. = a^2+b^2=c2 in this case it would be 7^2 + 10^2 = c
From there you would get the answer of 149, and you would have to square root it. When you square root 149 you get 12.2
12.2 + 7 = 19.2
You would add them together because you want to know the height before it broke.

7 0

3 years ago

Read 2 more answers

7/10 - 5/8 in simplest form

NISA [10]

Answer:

3/40 :D

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Solve the simultaneous equations by substitution 8y−3x=23 3x=2y+1