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Ilya [14]
3 years ago
14

Values that are solutions to the inequality x2 + 3x – 4 > 0.

Mathematics
1 answer:
natka813 [3]3 years ago
8 0

x^2 + 3x - 4 > 0\\
x^2-x+4x-4>0\\
x(x-1)+4(x-1)>0\\
(x+4)(x-1)>1\\
x\in(-\infty,-4)\cup(1,\infty)

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Why does -30 - - 50 equal 20? What steps are being done?
ale4655 [162]
Two negatives equal a positive, so its just like subtracting 50 and 30, but your answer will be a positive.
6 0
3 years ago
Read 2 more answers
Chloe received 86% on her first test, a 47/50 in her next test, and a 0.89 on her third test. List her percentages in order from
Mumz [18]

Answer:

  84%, 86%, 89%

Step-by-step explanation:

The three numbers, expressed as percentages, are ...

  • 86%
  • (47/50)×100% = 84%
  • 0.89×100% = 89%

Smallest to largest, they are 84%, 86%, and 89%. In the original form, they are 47/50, 86%, and 0.89.

7 0
3 years ago
Let f(x)=5x+5 find f(-1)<br><br>I need your help with this. please help me​
Alisiya [41]

f(x) = 5x+5\\\\f(-1) = 5(-1) +5  = -5+5=0

5 0
3 years ago
Punctele O, A, B, C sunt coliniare în această ordine, iar segmentele OA, AB și BC au lungimile exprimate în cm, prin numere natu
julia-pushkina [17]

Răspuns:

a) OC = 18cm

b) MN = 6cm

Explicație pas cu pas:

Găsiți diagrama la întrebarea atașată.

a) Din diagramă se poate observa că OC = OA + AB + AC

OC = 2n + 2n + 2 + 2n + 4

OC = 6n + 6

Următorul este să obțineți valoarea lui n:

OM = OA + AM

Să obținem segmentul AM;

Deoarece M este segmentul mijlociu al AC, atunci;

AM = AC / 2

AM = AB + BC / 2

AM = 2n + 2 + 2n + 4/2

AM = 4n + 6/2

AM = 2n + 3

Din moment ce OM = OA + AM

OM = 2n + 2n + 3

OM = 4n + 3

Dat fiind OM = 11

11 = 4n + 3

4n = 11-3

4n = 8

n = 2

Următorul pas este să calculați OC;

OC = 6n + 6

OC = 6 (2) + 6

OC = 18

Prin urmare, lungimea segmentului OC este de 18 cm

b) Această întrebare ne cere să găsim segmentul de linie MN.

Din diagramă, MN = AM - AN

Deoarece AM = 2n + 3 din întrebarea 1;

AM = 2 (2) +3

AM = 4 + 3

AM = 7

Acum, să obținem AN:

Din diagramă, AN = ON-OA și ON = OB / 2

AN = OB / 2 - OA

AN = (2n + 2n + 2) / 2 - 2n

AN = 4n + 2/2 - 2n

AN = 2n + 1 - 2n

AN = 2n-2n + 1

AN = 1

De la MN = AM - AN

MN = 7 - 1

MN = 6cm

Prin urmare, distanța dintre N, mijlocul segmentului OB și punctul M este de 6cm

6 0
4 years ago
...............................................
olga55 [171]

Answer:

your answer will be a. .12 minutes

Step-by-step explanation:

this is your answer because you will add .12 to .08 to get your answer

5 0
3 years ago
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