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3 years ago

Solve the inequality 7(x + 4) > 0.

Mathematics

2 answers:

sergejj [24]3 years ago

4 0

Answer:

x > - 4

Step-by-step explanation:

matrenka [14]3 years ago

3 0

Answer:

x > - 4

Step-by-step explanation:

Given

7(x + 4) > 0 ← distribute left side

7x + 28 > 0 ( subtract 28 from both sides )

7x > - 28 ( divide both sides by 7 )

x > - 4

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Pleaseee help asap!!! marking brainiest!!!

yan [13]

Answer:

Step-by-step explanation:

We can see that both functions are decreasing in [0,4]

f 868⇒ 103
g 800⇒0

868-103 =765

f decreased with 765 against 800 for g

g decreased faster

3 0

3 years ago

Write as a product 60 + 6ab - 30b - 12a

Delvig [45]

Answer:

6(a - 5)(b - 2)

Step-by-step explanation:

60 + 6ab - 30b - 12a

Factor out the common term 6:

= 6(10 + ab - 5b - 2a)

Rearrange:

= 6(ab - 2a - 5b + 10)

Factor:

= 6(a - 5)(b - 2)

4 0

2 years ago

2. Delia and Beto left for school at the same time.

Tema [17]

Answer:

Beto will get to the school first.

Step-by-step explanation:

We are given that Delia lives 3/4 mile from school and walks at a pace of

16 minutes per mile.

So Delia takes $\frac{3}{4} \times 16 =$ 12 minutes to reach school.

While Beto lives 3 1/2 miles from school and bikes at a pace of 3 minutes per mile.

So Beto takes $\frac{7}{2} \times 3 =$ 10.5 minutes to reach school.

Therefore, Beto will get to the school first.

5 0

3 years ago

For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hi

larisa [96]

Answer: a) $(0.99)^4$

Step-by-step explanation:

Given : For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hills bank.

Each of the four systems detects theft with a probability of .99 independently of the others .

Probability for independent events $(E_1 , E_2 , E_3 , ....., E_n)$ occurs together = $P(E_1)\times P(E_2)\times P(E_3)\ .....\times P(E_n)$ .

Then, the probability that when a theft occurs, all four systems will detect it

= (0.99) x (0.99) x (0.99) x (0.99)

$= (0.99)^4$

Hence, the probability that when a theft occurs, all four systems will detect it is $(0.99)^4$ .

Hence, the correct answer is a) $(0.99)^4$ .

5 0

3 years ago

Find 25% of 80 kg A 40kg B 10kg C 8kg D 20kg help me plss

vova2212 [387]

Answer:

25% of 80 is D. 20kg

Step-by-step explanation:

50% of 80 is 40 and we know that 25% is half of 50%, so half of 40 would be 20.

So, the answer is D. 20kg

Hope this helps! :)

8 0

2 years ago