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Rus_ich [418]
3 years ago
12

I need help please on #7

Mathematics
2 answers:
vredina [299]3 years ago
7 0
X=-4 is the answer for this question
solong [7]3 years ago
4 0

Answer:

x  ≤ - 4

Step-by-step explanation:

7x + 12  ≤ -2x + 4x - 8

7x + 12  ≤ 2x - 8

7x - 2x + 12  ≤ 2x - 2x - 8

5x + 12  ≤ -8

5x + 12 - 12  ≤ - 8 - 12

5x  ≤ - 20

<u>5x  ≤ - 20</u>

5          5

x  ≤ - 4

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90% of 11 is what number
umka2103 [35]
It would be: 11 * 90/100
= 11 * 0.90 = 9.9

So, your final answer is 9.9

Hope this helps!
8 0
4 years ago
If x=5^a, find the value of 5x. How?
Yakvenalex [24]

Answer:

5x = 5^{(a+1)}

Step-by-step explanation:

Here is a problem with the concept of properties of the exponent.

We are given x = 5^{a} and we have to find the value of 5x.

Now, 5x = 5 \times 5^{a} {Since we are given that x = 5^{a}}

⇒ 5x = 5^{1} \times 5^{a} {Since we can write x = x^{1}}

⇒ 5x = 5^{(a+1)} {Since we know the formula of exponent as x^{m} \times x^{n} = x^{(m + n)}}

(Answer)

7 0
3 years ago
A large tank holds 1.9 x 10^7 gallons of oil. How much oil can be stored in 9 tanks. Write your answer in scientific notation.
bearhunter [10]

Answer:

1.71 × 10^8 gallons

Step-by-step explanation:

1.9 × 10^7 = 19,000,000

19,000,000 × 9 = 171,000,000

171,000,000 in scientific notation is 1.71 × 10^8

5 0
3 years ago
1. A line passes through (9, -9) and (10,-5).
jenyasd209 [6]

Answer:

1. y+5=4x-40

2.y=4x-45

Step-by-step explanation:

To get the slope of a line you do y₂-y₁/x₂-x₁ so we plug in the values -9+5/9-10 and we get -4

Point-slope form states y-y₁=m(x-x₁) where m is the slope so plug in the values we get y+5=4(x-10) and you get y+5=4x-40 then turn this equation into y=mx+b and get y= 4x-45

5 0
3 years ago
Câu 1. Cho ánh xạ f : R
9966 [12]

what is your clear question? it lacks some details

4 0
3 years ago
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