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Free_Kalibri [48]
3 years ago
6

Need help with this question!

Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
6 0

Step-by-step explanation:

a=(x + 3)

b=2x

c=(2x + 2.4)

(x + 3)^2 + 2x^2 = (2x + 2.4)^2

=3x^2 + 6x + 9 = 4x^2 + 9.6x +5.76

= -x^2 - 3.6x + 3.24 = 0

now we have a quadratic equation so

a= -x

b= -3.6

c= 3.24

x=-\frac{3.6 + \sqrt{25.92} }{2} , x=\frac{\sqrt{25.92} -3.6}{2}

rosijanka [135]3 years ago
3 0
Not sure:((((((( sorrryyyy
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Find the unit rate in feet per second <br> 300 yards over 1 minute
arlik [135]
In order to find the unit rate in ft / sec of 300 yards / min. We first have to elicit the conversion values for each unit of measurement, this will allows us identify how much will we multiply in order to get the goaled value.
Conversion values:
<span><span>1.    </span>1 yard = 3 feet</span>
<span><span>2.    </span>1 minute = 60 seconds</span>

Solution: <span><span>
1.    </span>300 yards x 3 feet/1 yard = 900 feet</span>
<span><span>2.    </span>1 minute x 60 seconds / 1 minute = 60 seconds</span>

Thus, 900ft/60sec



7 0
3 years ago
Read 2 more answers
What's the reciprocal of 2 4/7 ?​
Gnom [1K]

Answer:

7/18

Step-by-step explanation:

²\frac{4}{7}=((2*7)+4)/7

2*7=14

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18/7⇒7/18

4 0
3 years ago
Explain how to add fractions with unlike denominators. Please be as specific as possible.
Gelneren [198K]

Answer:

Look below

Step-by-step explanation:

So I will use an example to try and show you how to do this.

If we have 1/2 + 1/3, we know that we don't have like denominators. We can change this by finding one. All we need to do is multiply our denominators. So in our example, that would be 2*3=6. Our new denominator would be 6. So now we would have 1/6 + 1/6 which isn't the same as our old equation. That is because we haven't multiplied our top numbers yet. To do this, we need to multiply the top number by the opposite denominator like so, 3/6+2/6.

So our first fraction was

1/2+1/3

We then multiplied the whole fraction by the opposite denominator

3/6+2/6

Thanks! Hope you choose me for brainliest!!! Have a nice day!

5 0
3 years ago
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lana [24]

Answer:

Angle DGF = DEF

Step-by-step explanation:

Since all the angles are congruent in the diagram and the hypothenuses are both congruent, it makes the other triangle, DEF congruent to DGF.

In other words, sense all 3 angles are congruent and they share a side, DEF is congruent to DGF.

3 0
3 years ago
What is the measure of the lowercase c?
Leona [35]
The measure of angle c would be 84
3 0
2 years ago
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