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vredina [299]
2 years ago
9

Find the numerical values of -3|x|+2x-1 if x=-5. PLSSSS HELP

Mathematics
1 answer:
Kisachek [45]2 years ago
3 0

Answer:

26

Step-by-step explanation:

Since x = -5, we can replace x with it's numerical -5, right? The problem tells you that x is equal to -5. So, just replace any x you see with -5.

So in this case,

-3|x|+2x-1

turns into:

-3|(-5)|+2(-5)-1

You can use a calculator or solve it by hand to see what the answer is.

-3|(-5)|+2(-5)-1\\-3(5)+2(-5)-1\\-15+(-10)-1\\-25-1\\-26

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A board 91 cm long is to be cut into two parts so that the longer part is 10 cm more than twice as long as the shorter part. Fin
mojhsa [17]

Answer:

The parts are 27 cm and 64 cm long.

Step-by-step explanation:

Let the shorter part be x.

"The longer part is 10 cm more than twice as long as the shorter part."

shorter part: x

longer part: 2x + 10

total length: x + 2x + 10

total length: 91

x + 2x + 10 = 91

3x + 10 = 91

3x = 81

x = 27

2x + 10 = 2(27) + 10 = 54 + 10 = 64

Answer: The parts are 27 cm and 64 cm long.

7 0
3 years ago
Will give brainliest FAST
sleet_krkn [62]
This is the answer I wish you will understand

7 0
3 years ago
the difference between two numbers is 9. the first number plus twice the other number is 27. find the two numbers
tatuchka [14]
So,

Let's translate this into mathematical form.

x - y = 9
x + 2y = 27

Elimination by Addition
Divide both sides of the second equation by 2
\frac{1}{2}x + y = 13 \frac{1}{2}

Add the two equations together
\frac{3}{2} x = \frac{45}{2}

Multiply both sides by \frac{2}{3}
x =  \frac{90}{6} \ or \ 15

Substitute
15 - y = 9

Subtract 15 from both sides
-y = -6
y = 6

Substitute
15 - 6 = 9
9 = 9 This checks.

15 + 2(6) = 27

Distribute
15 + 12 = 27
27 = 27 This also checks.

S = {(15,6)}
5 0
3 years ago
Read 2 more answers
F(x)= -7x-1<br> f(_)=-8<br><br> Please help.. ASAP!
navik [9.2K]

-8=-7x -1

Add 1 to both sides

-7=-7x

Divide both sides by -7

X=1

4 0
3 years ago
To the nearest 1000, there are 18,000 people at a festival . Write down the minimum possible number of people at the festival
Andreyy89

Answer:

17500

Step-by-step explanation:

17499 rounds down

17500 rounds up

8 0
3 years ago
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