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Nuetrik [128]
3 years ago
11

Find the value of the variable x in the equation x – 21 = 8. A. –13 B. 13 C. 29 D. –29

Mathematics
2 answers:
Flura [38]3 years ago
8 0

Answer:

<h2>C.  29</h2>

Step-by-step explanation:

x - 21 = 8      <em>add 21 to both sides</em>

x - 21 + 21 = 8 + 21

x = 29

Aleksandr [31]3 years ago
3 0

Answer:

C. 29

Step-by-step explanation:

x – 21 = 8

Add 21 to each side to isolate x

x-21+21 = 8+21

x = 29

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padilas [110]

Answer:

p(-5)=-11,987

p(3)=-227

Step-by-step explanation:

To find the value of the function p(-5) just substitute x=-5 into the function expression instead of x:

p(-5)=2\cdot (-5)^5-9\cdot (-5)^4-2\cdot (-5)^2+12\cdot (-5)-2=\\ \\=-6,250-5,625-50-60-2=-11,987

To find the value of the function p(3) just substitute x=3 into the function expression instead of x:

p(3)=2\cdot 3^5-9\cdot 3^4-2\cdot 3^2+12\cdot 3-2=\\ \\=486-729-18+36-2=-227

3 0
4 years ago
Read 2 more answers
Hi , step by step please
Zigmanuir [339]

Answer:

Eldest: $335,500   Middle: $182,750   Youngest: $167,750

Step-by-step explanation:

Let's represent the amount of money the youngest sibling received as x.

The amount the eldest received can be represented as: 2x

The amount the middle sibling received can be represented as: x + 15,000

If we combined the amount of money that all of the siblings received, it would be $686,000. We can write this as an equation:

686,000 = 2x + (x + 15,000) + x

Now let's solve for x. First, combine like terms

686,000 = 4x + 15,000

Subtract 15000 from both sides to isolate the 4x

671,000 = 4x

Divide both sides by 4 to isolate the x

167,750 = x

Now we know that the amount of money the youngest received is $167,750. We can use this amount to figure out how much the other two siblings received.

Eldest: 2 * 167,750 = $335,500

Middle: 167,750 + 15,000 = $182,750

We can check to make sure these answers are correct by adding them all together to make sure that they equal 686,000

167,750 + 335,500 + 182,750 = 686,000

7 0
4 years ago
2x + 16y + z = 7<br> x+2y-z = -1
Georgia [21]

Answer:

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Step-by-step explanation:

по поводу того что бы не можете дозвониться не смогла найти

5 0
2 years ago
It takes Mia 1/4 hour to pick out all beads and 1/10 hour to string them. If she only has 5 and 1/4 to make bracelets how many w
JulsSmile [24]

Answer:

15

Step-by-step explanation:

Mia take 1/4 and 1/10 hours to create a bracelet. This is 1/4 + 1/10 = 10/40 + 4/40 = 14/40 = 7/20.

It takes her a total of 7/20 hours to make the bracelet. She has 5 1/4 hours to work. To find the number of bracelets she can make divide 5 1/4 by 7/20.

Write first 5 1/4 as a mixed number. 21/4. Then rewrite it as multiplication with the reciprocal of 7/20 to divide fractions.

21/4 * 20/7 = 420/28 = 15

She will make 15 bracelets.

4 0
3 years ago
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Answer:

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Step-by-step explanation:

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