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2 years ago

Can someone help me with this problem

Mathematics

1 answer:

adelina 88 [10]2 years ago

6 0

Angle B is 79 because of reflective property (however you spell it)

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Nadine can send or receive a text message for $0.15 or get an unlimited number for $5.00. Write and solve an inequality to deter

34kurt

Answer:

0.15*t < 5.00

33 texts

Step-by-step explanation:

given : $0.15 per text; unlimited cost is $5.00

# of texts = t

0.15*t < 5.00

t < 33.33; since you cannot make 33.33 texts i will round down to 33 texts.

Basically you can send or receive up to 33 texts and it will be cheaper than $5.00

0.15(33) = $4.95

at 34 texts, 0.15(34) = $5.10

8 0

3 years ago

Solve for x in the equation.

labwork [276]

Answer:

The solution is $\displaystyle x=1\pm \sqrt{47}$ . Fourth option

Explanation:

Solve for x:

$2x^2+3x-7=x^2+5x+39$

Move all the terms from the right to the left side of the equation, a zero in the right side:

$2x^2+3x-7-x^2-5x-39=0$

Join all like terms:

$x^2-2x-46=0$

The general form of the quadratic equation is:

$ax^2+bx+c=0$

Solve the quadratic equation by using the formula:

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

In our equation: a=1, b=-2, c=-46

Substituting into the formula:

$\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}$

$\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}$

$\displaystyle x=\frac{2\pm \sqrt{188}}{2}$

Since 188=4*47

$\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}$

Take the square root of 4:

$\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}$

Divide by 2:

$\displaystyle x=1\pm \sqrt{47}$

First option: Incorrect. The answer does not match

Second option: Incorrect. The answer does not match

Third option: Incorrect. The answer does not match

Fourth option: Correct. The answer matches exactly this option

8 0

3 years ago

A colony of 23,000 bacteria doubles in size every 267 minutes. What will the population be 534 minutes from now?

Blababa [14]

Answer:

92000

Step-by-step explanation:

Since you are asking in 534 minutes, that means it will double twice.

23000 * 2 * 2 = 92000

7 0

3 years ago

Read 2 more answers

Round 7.3519 to 1 decimal place

Temka [501]

7.4 is your final answer, hope that help, one decimal place is the first number after the decimal.

8 0

3 years ago

llean works as a welder in web designer as a welder she earns $18 per hour last week she works x hours as a wlder and her Fran p

melamori03 [73]

18 times x = $75

I wasn’t able to find the multiplication sign on my keyboard and didn’t want to confuse you so I replaced x with times

5 0

3 years ago