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IgorC [24]
3 years ago
6

Is it true that x= -5 ? -2(-4x-1)-x+3=−30 Justify your answer.

Mathematics
2 answers:
grandymaker [24]3 years ago
6 0

Answer:

Step-by-step explanation:

here you go mate

step 1

-2(-4x-1)-x+3=−30  equation/Question

step 2

-2(-4x-1)-x+3=−30  distribute

7x+5=-30

step 3

7x+5=-30  subtract 5

7x=-35

step 4

\frac{7x}{7} =\frac{-35}{7}  divide

answer

x=-5

nikitadnepr [17]3 years ago
3 0

Answer:

-2(-4x-1)-x+3=-30

8x+2-x+3=-30

7x+5=-30

7x=-30-5

7x=-35

x=-35÷7

x=-5

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Graph this problem please and thank you
nirvana33 [79]
I am not able to graph but I will help you out. All you have to do to solve this is add the rule to the original x and y values. If the rule is (x+9, y-2) and the point is (-2,3) all we’d to do is plug it in.

-2+9=7
3-2=1
So the new point for P would be (7, 1)

If you need anyone help, lemme know. If you really can’t figure it out. I will grab my computer and graph it for you.
6 0
3 years ago
I really need help with this one
Arte-miy333 [17]

Step-by-step explanation:

here is the answer to your question

5 0
3 years ago
You are competing in a race. The table shows the times from last year's race you want your time to be last year's median time wi
aleksandr82 [10.1K]

Answer:

27\leq x \leq37

Step-by-step explanation:

Let's arrange the numbers from least to greatest:

20, 25, 27, 28, 31, 32, 32, 38, 40, 40, 42, 48

The median is the "middle" number when arranged from least to greatest.

There are 12 numbers, so the middle number would be "average" of 6th and 7th terms.

6th term = 32

7th term = 32

Average = (32+32)/2 = 32

Hence, median = 32

Absolute deviation of 5 minutes means 5 minutes less or greater than the median, 32.

So, 32 - 5 = 27  &  32 + 5 = 37

Hence  27\leq x \leq37

4 0
3 years ago
Helpppp me please!! I dont understand.
Lorico [155]

Answer:

A) mJK = 21

B) mJNM = 159º

C) mKL = 159

D) mJKM = 201

E) mMKL = 339

Step-by-step explanation:

Circle = 360º

360º - 21º = 339º (what all missing angles have to add up to)

Assuming that:

JNL and KNM are both 180º angles

KJ and JM are supplementary as well as KL and LM

If we subtract 21º from 180º we get 159º which is both LM and KL

If we add 21º to 180º we get 201º which is both JKM and LMK

By subtracting 21º from 360º we know that MKL is 339ª

if we add 159º + 159º + 21º we get 339º which proves that those are our missing angles becuase our missing angles must make a total of 339º

Sorry that took so long I was pulling out all my notes from last year to make sure I was doing this right ^^;

3 0
4 years ago
Evaluate the function. f(x) = -3x2 - 6x + 1 Find f(8)​
ryzh [129]

Answer:

f(8)=-53

Step-by-step explanation:

f(x)=-3 * 2-6x+1

At x=8

f(8)=-6-6(8)+1\\\\f(8)=-53

7 0
3 years ago
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