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tresset_1 [31]
3 years ago
7

The value of each variable

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
8 0
This is a simple Pythagorean Theorem problem. 7 is the hypotenuse so you would do c^2-a^2=b^2. In this case 7^2-2^2=b^2. 7^2 is 49 and 2^2 is 4 so you have 49-4=b^2. 49-4 is 45. The square root of 45 is 6.70. So x=6.70
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Arthur is 10 years old tuition for one year at a public to your college is $3125 in eight years tuition is expected to increase
weqwewe [10]

Answer:

  yes

Step-by-step explanation:

In 8 years, when the tuition increases 32% over its present value, it will be ...

  $3125 × (1 +32%) = 1.32 × $3125 = $4125 . . . expected cost

If the family saves $75 per month for 60 months, they will have saved ...

  60 × $75 = $4500 . . . amount saved

The saved amount will exceed the expected cost of one year of college.

5 0
3 years ago
If there are 60% are boys. If there are 21 boys in the choir, how many members does the choir have in total?
Svet_ta [14]
Cross multiply: 60%/100% =21/x
X is the variable we are trying to find.
100*21=2,100
2,100/60
X =35
All together in the choir there are 35 members.

I hope this helps!
6 0
3 years ago
According to the Rational Root Theorem, which number is a potential root of f(x) = 9x8 + 9x6 – 12x + 7?
AysviL [449]

Answer:

\pm 1, \pm\dfrac{1}{3},\pm\dfrac{1}{9},\pm 7, \pm\dfrac{7}{3},\pm\dfrac{7}{9}.

Step-by-step explanation:

According to the Rational Root Theorem, the potential roots of a polynomial are

x=\pm\dfrac{p}{q}  

where, p is a factor of constant and q is a factor of leading term.

The given polynomial is

f(x)=9x^8+9x^6-12x+7

Here, 9 is the leading term and 7 is constant.

Factors of 9 are ±1, ±3, ±9.

Factors of 7 are ±1, ±7.

Using rational root theorem, the rational or potential roots are

x=\pm 1, \pm\dfrac{1}{3},\pm\dfrac{1}{9},\pm 7, \pm\dfrac{7}{3},\pm\dfrac{7}{9}

Therefore, the potential root of f(x) are \pm 1, \pm\dfrac{1}{3},\pm\dfrac{1}{9},\pm 7, \pm\dfrac{7}{3},\pm\dfrac{7}{9}.  

4 0
3 years ago
Read 2 more answers
-6z+(-5.5)+3.5z+5y-2.5 simplyfied?
frosja888 [35]

Answer:

  • \boxed{\sf -2.5z+5y-8}

Step-by-step explanation:

\sf -6z+(-5.5)+3.5z+5y-2.5

\sf -6z-5.5+3.5z+5y-2.5

\sf -6z+3.5z+5y-5.5-2.5

\sf( -6z+3.5z) \sf (5y) \sf (-5.5-2.5)

\sf -2.5z+5y-8

\underline{--------------}

Hope it helps! :)

3 0
3 years ago
Read 2 more answers
If
lesantik [10]

Answer:

x = (64 + 5) ÷ 3

Step-by-step explanation:

                                        3x - 5 = 64

Add 5 to both sides:            3x = 64 + 5 = 69

Divide both sides by 3:          x = 69 ÷ 3 = 23

So the answer is x = (64 + 5) ÷ 3

Note:  If we didn't add the parentheses then using the order of operation x = 64 + 5 ÷ 3 would be x = 64 + \frac{5}{3} = 65 \frac{2}{3}

8 0
3 years ago
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