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3 years ago

12

latisha has 7 boxes with 21 shells in each box. she has 6 bags with 17 shells in each bag. she uses 18 shells to make a design.

which of these expressions can latisha use to find how many shells are left

1 answer:

Neporo4naja [7]3 years ago

7 0

Answer:

231

Step-by-step explanation:

7x21=147

6x17=102

147+102=249

249-18=231

Answer: Letter D 7x21+6x17-18

Bye yw!

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Out of 100 seventh and eighth grade CAVA students there were 35 students that chose Music as their elective course and the rest

frutty [35]

Answer:

<u>| </u><u>Music | World Language | Total </u><u> </u>

<u>8th grade</u><u> | 30 | 35 | 65 </u>

<u>7th grade</u><u> | 5 | 30 | 35 </u>

Total | 35 | 65 | 100

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3 years ago

13. f(x) = x^4<br> - 9x2 -22x - 24

Anna007 [38]

Answer:

x = 4 or x = -2

Step-by-step explanation:

Solve for x over the real numbers:

x^4 - 9 x^2 - 22 x - 24 = 0

The left hand side factors into a product with three terms:

(x - 4) (x + 2) (x^2 + 2 x + 3) = 0

Split into three equations:

x - 4 = 0 or x + 2 = 0 or x^2 + 2 x + 3 = 0

Add 4 to both sides:

x = 4 or x + 2 = 0 or x^2 + 2 x + 3 = 0

Subtract 2 from both sides:

x = 4 or x = -2 or x^2 + 2 x + 3 = 0

Subtract 3 from both sides:

x = 4 or x = -2 or x^2 + 2 x = -3

Add 1 to both sides:

x = 4 or x = -2 or x^2 + 2 x + 1 = -2

Write the left hand side as a square:

x = 4 or x = -2 or (x + 1)^2 = -2

(x + 1)^2 = -2 has no solution since for all x on the real line, (x + 1)^2 >=0 and -2<0:

Answer: x = 4 or x = -2

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3 years ago

I need help with #7:((<br> Plz help!?!

slava [35]

The answer is 13 and a half

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3 years ago

Hi, can you please help me answer this direct proportion question?

Oksanka [162]

Answer:

X = 100

Step-by-step explanation:

In proportion questions, they want you to multiply one of the sides by a variable, (i usually represent it with K) and then change the proportion sign to an equal.
This is because proportional means they have a ratio between them, with one side increasing by "k" for each increase in the other side.

Multiply the left by k, so $y = \frac{k}{\sqrt{x} }$
we know that y= 5, for x = 36, so sub this in the equation
$5 = \frac{k}{\sqrt{36} }$
simplify $5 = \frac{k}{6 }$
re-arrange for k, <u>k = 5*6 = 30</u>
now we know k, we can create the real equation, $y = \frac{30}{\sqrt{x} }$
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2 years ago

How to solve f+4/g=6 for f

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