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sattari [20]
3 years ago
5

Pls help asap if square x = -7 ; then x = - 49

Mathematics
1 answer:
natima [27]3 years ago
4 0
Should be false because -7 x -7 is not -49 it is 49
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Which statement is true about 513? A. It is a prime number. B. It is a composite number. C. It is a whole number that is neither
max2010maxim [7]
A isn't true because 513 is at least divisible by 3, so it's not a prime number.
C isn't true because all whole numbers are either prime or composite. 
D isn't true because it is neither a imaginary number, fraction, decimal, or unreal number, so therefore it must be a whole number.
B is true, because it is able to be divided by numbers other than one and itself. 
5 0
3 years ago
Read 2 more answers
On a map, 1/2 inch represents 10 actual miles. Two towns that are 4 1/2 inches apart on this map are how many actual miles apart
dusya [7]
The answer is E.90

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9(1/2) inches = 4 1/2 inches
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QUESTION: Kaya has $45 to spend at the Hawaii State Fair. If the admission to the fair is $4 and the rides cost $1.50 each, what
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3 years ago
While on vacation in Rockport, Cole went out for a dinner that cost $30. If sales tax in Rockport is 10% and Cole left a 20% tip
Fantom [35]

Answer:

$39

Step-by-step explanation:

To calculate the total cost of his meal, add the subtotal ($30), the tax on subtotal ($30 X 10%) and the tip ($30 X 20%).

Convert all percentages to decimals to multiply.

Finding tax:

10% = 0.1

Tax = $30 X 0.1 = $3

Finding tip:

20% = 0.2

Tip = $30 X 0.2 = $6

Subtotal + Tax + Tip

= $30 + $3 + $6

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4 0
4 years ago
X(2x-5) = 12<br><br> How to solve for x?
vlabodo [156]

Answer:

x=4,\:x=-\frac{3}{2}

Step-by-step explanation:

x\left(2x-5\right)

Apply the distributive law.

=x\cdot \:2x-x\cdot \:5
=2x^2-5x
2x^2-5x=12
Subtract 12 from both sides.
2x^2-5x-12=12-12
2x^2-5x-12=0
Now, apply the quadratic formula.
x_{1,\:2}=\frac{-\left(-5\right)\pm \sqrt{\left(-5\right)^2-4\cdot \:2\left(-12\right)}}{2\cdot \:2}
x_{1,\:2}=\frac{-\left(-5\right)\pm \:11}{2\cdot \:2}
Separate the solutions.
x_1=\frac{-\left(-5\right)+11}{2\cdot \:2},\:x_2=\frac{-\left(-5\right)-11}{2\cdot \:2}
Simplify.
x=4,\:x=-\frac{3}{2}

5 0
2 years ago
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