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ryzh [129]
2 years ago
15

Help ASAP A TIMED QUIZZZZZ

Mathematics
2 answers:
zhuklara [117]2 years ago
7 0

Answer:

3rd one

Step-by-step explanation:

1 and 1/2 3 times is the third one

beks73 [17]2 years ago
6 0

Answer:

3rd one i think

Step-by-step explanation:

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The perimeter of a rectangle is 42 cm. The longer side has length of 7 cm more than the shorter side. Find the length of longer
Lelu [443]
So to solve, make an equation (x being the shorter side)
2x+2(7+x)=42
So just solve from here.
2x + 14 + 2x =42
4x=28
x=7 
So the shorter side is 7, and the longer side is 14.
5 0
3 years ago
Read 2 more answers
Which of the following is a solution of x^2 + 2x + 4?
Kaylis [27]

Answer:

\displaystyle x_1=-1+\sqrt{3}i

\displaystyle x_2=-1-\sqrt{3}i

Step-by-step explanation:

<u>Second-Degree Equation</u>

The second-degree equation or quadratic equation has the general form

ax^2+bx+c=0

where a is non-zero.

There are many methods to solve the equation, one of the most-used is by using the solver formula:

\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

The equation of the question has the values: a=1, b=2, c=4, thus the values of x are

\displaystyle x=\frac{-2\pm \sqrt{2^2-4\cdot 1\cdot 4}}{2\cdot 1}

\displaystyle x=\frac{-2\pm \sqrt{-12}}{2}

Since the square root has a negative argument, both solutions for x are imaginary or complex. Simplifying the radical

\displaystyle x=\frac{-2\pm 2\sqrt{-3}}{2}=-1\pm\sqrt{3}i

The solutions are

\displaystyle x_1=-1+\sqrt{3}i

\displaystyle x_2=-1-\sqrt{3}i

7 0
3 years ago
MATH 30 POINTS WILL GIVE BRAINLIEST<br><br> help please
natulia [17]

The fundamental behavior that's important here is that, as t gets arbitrarily large, a^t becomes smaller (decays) if |a| and larger (grows) if |a|>1.

100\left(1-\dfrac12\right)^t=100\left(\dfrac12\right)^t\implies\dfrac12

0.1(1.25)^t\implies1.25>1\implies\text{growth}

426(0.98)^t\implies0.98

2050\left(\dfrac12\right)^t\implies\text{decay}

\left((1-0.03)^{1/2}\right)^{2t}=0.97^t\implies0.97

3 0
3 years ago
If you only have the original price ($24.50) and the discount is 18% how do you find the sale price?
liberstina [14]
24.5 x (1-18%)
=$20.09
4 0
3 years ago
BRAINLIEST AVAILABLE!!!!<br><br> PLEASE HELP ME WITH THIS!!!<br> Thanks to all helpers!!!!!
larisa [96]

Answer: B

<u>Step-by-step explanation:</u>

-10x² + 12x - 9 = 0

a=-10, b=12, c=-9

x = \frac{-b+/-\sqrt{b^{2}-4ac}} {2a}

  = \frac{-12+/-\sqrt{12^{2}-4(-10)(-9)}} {2(-10)}

  = \frac{-12+/-\sqrt{144-360}} {-20}

  = \frac{-12+/-\sqrt{-216}} {-20}

  = \frac{-12} {-20} +/- \frac{\sqrt{-216}} {-20}

  = \frac{3} {5} +/- \frac{6i\sqrt{6}} {-20}

  = \frac{3} {5} +/- \frac{3i\sqrt{6}} {10}

3 0
3 years ago
Read 2 more answers
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