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3 years ago

Can someone check this for me please?

Mathematics

2 answers:

choli [55]3 years ago

5 0

Answer:

B. -4, -3

Step-by-step explanation:

The equation x^(2) + 7x + 12 can be factored using the AC method resulting in

( x + 4 )( x + 3 ). So x = -4, -3. You can use foil to check.

pashok25 [27]3 years ago

5 0

I’m not positive but I think the answer is actually B I’m not sure tho!

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Solve the quadratic equation<br> give your answer to 2 decimal places<br> : 3x^2+x-5=0

Dima020 [189]

Given:

The quadratic equation is:

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

To find:

The solution for the given equation rounded to 2 decimal places.

Solution:

Quadratic formula: If a quadratic equation is $ax^2+bx+c=0$ , then:

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

We have,

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

Here, $a=3,b=1,c=-5$ . Using the quadratic formula, we get

$x=\dfrac{-1\pm \sqrt{1^2-4(3)(-5)}}{2(3)}$

$x=\dfrac{-1\pm \sqrt{1+60}}{6}$

$x=\dfrac{-1\pm \sqrt{61}}{6}$

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Now,

$x=\dfrac{-1+7.81025}{6}$

$x=1.13504167$

$x\approx 1.14$

And

$x=\dfrac{-1-7.81025}{6}$

$x=-1.468375$

$x\approx -1.47$

Therefore, the required solutions are 1.14 and -1.47.

3 0

3 years ago

Use inverse operations to solve equation 15=x/6-1

beks73 [17]

Answer:

x=90.

Step by step explanation:

To solve the expression $15=\frac{x}{6}-1$ , and obtaining a value for x we can do the following:

Add 1 both sides of the equation. This will result in $15+1=\frac{x}{6}-1+1$ ⇒ $16=\frac{x}{6}$ .
Multiply both sides by 6, which yields $15\times6=\frac{x}{6}\times6$ . This results in $90=x$ .

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4 years ago

The angle measure of a triangle is shown in the diagram.

zalisa [80]

Answer:

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Step-by-step explanation:

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3 years ago

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The average weight of the three lion cubs at the zoo was 288 pounds. Two of the cubs weighed 261 and 252 pounds. What was the we

stiv31 [10]

Answer:

351 pounds

<h2>Step-by-step explanation:</h2>

288 x 3 = 864 pounds

864 - 261 - 252 = 351 pounds

Therefore (261 + 252 + 351)/3 = 288.

So the answer is 351 pounds

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3 years ago

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mezya [45]

If 24 of the 60 were saved then the percent saved is

(24/60) x 100

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(60/60) x 100 = 100%

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