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Ksju [112]
3 years ago
9

X2 + 20 = 40 .... What is X​

Mathematics
2 answers:
Tju [1.3M]3 years ago
7 0

Answer:

2x +20=40

=)2x=40-20

= )x \:  =  \frac{20}{2}

=) x =10

TEA [102]3 years ago
6 0

Answer:

10

Step-by-step explanation:

x2+20=40

20-40=x2

x2=20

20÷2=x

x=10

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How can you use rates to determine wheather a situation is a proportional relationship
svp [43]

<em>If the rate is a constant, the relationship is proportional.</em> (The rate is the constant of porportionality.)

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For two or more points on the function curve, divide the dependent variable value by the independent one. If you get the same result in every case, the relationship is porportional.

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<em>Note</em>

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7 0
2 years ago
A piggy bank contains a nickels, dimes and quarters. There are five more dimes than nickels and twice as many quarters as dimes.
Natasha2012 [34]

Answer:

34 nickels, 39 dimes, 78 quarters

Step-by-step explanation:

q = quarters, d = dimes, n = nickels

n = d - 5

q = 2d

.25q + .10d + .05n = 7.55

<em>Plug in the first 2 equations into the third one</em>

.5d + .10d + .05(d - 5) = 7.55

<em>Open up the Parenthesis</em>

.5d + .10d + .5d - .25 = 7.55

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n = 39 - 5 = 34

q = 2(39) = 78

4 0
3 years ago
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