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Korolek [52]
4 years ago
6

Can someone please help me it's worth ten points

Mathematics
2 answers:
lutik1710 [3]4 years ago
7 0
Wow I don’t know but this person gave a great answer to these questions and really deserves brainliest. So I’m posting this so you can get a reward!! Mark Kash as brainliest. : )
STatiana [176]4 years ago
5 0
1. Line 3 is the first error. In order to get rid of the 25, you add it to both sides, not subtract. So, your answer is B.

2. Line 1 because it says in the question "4 less than a number" and the equation adds 4, instead of subtracting. Your answer is A. 

3. Line 4. To get rid of the 6 in front of 6x, you have to divide by it, but instead they multiply. So, your answer is C.

4. To solve this, you will use the distributive property first:
4(x-3)=16
Turns into:
4x-12=16
Get rid of the 12:
4x=28
Divide by 4:
x = 7
Your answer is B.

5. You have to set it up:
\frac{x}{3} = -11+4
Just solve for x:
\frac{x}{3} = -7
Multiply both sides by 3 to isolate x:
x = -21

Your answer is B.

Hope this helps, if any step doesn't make sense, feel free to tell me!
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Other answer is 148 degrees but I need help
IrinaK [193]

Answer:

122˚

Step-by-step explanation:

1. Visual estimation

∠BXD is obtuse so ∠BXD > 90˚

7 0
3 years ago
How do u do this cuz I don’t understand how my teacher did this
Oxana [17]

Answer:

1 is a, 2 is c, 3 is a, 4 is b, 5 is c, 6 is a, 7is a,8 is b, 9 is c

Step-by-step explanation:

6 0
3 years ago
X=y-1<br> y=4-2x<br> solve by using the substitution method. pls explain how you did it too pls
sergiy2304 [10]
It would be (1,2)

x=1 and y=2

4 0
3 years ago
A credit card contains 16 digits between 0 and 9. However, only 100 million numbers are valid. If a number is entered randomly,
marusya05 [52]

Answer:

P(valid) = 1 * 10^{-8}

Step-by-step explanation:

Let us first find the number of possible credit card numbers that can be formed with the numbers 0 - 9.

We want to form a 16 digit number out of 10 digits, so, we have:

N = 10^{16}

There are 10^{16} numbers that can be formed.

There are only 100 million valid numbers (100 * 10^6 = 10^8). Let the number of valid numbers be n.

Therefore, the probability of picking a number that is valid is:

P(valid) = n / N

P(valid) = 10^{8} / 10^{16}\\\\P(valid) = 1 * 10^{-8}

8 0
3 years ago
Brad took 5 kicks and made 4 goals: 4/5
Brilliant_brown [7]

Answer: 8/10

Step-by-step explanation: so you have to multiply 5 times x u till you get 10 so you’ll multiply it 2 times and since you multiplied the left 5 times two you have to multiply the 4 by 2 also to keep everything equal so the final answer is 8/10

6 0
2 years ago
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