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Elena-2011 [213]
3 years ago
5

HhHheLLlpP Help help help help help plzz

Mathematics
2 answers:
GrogVix [38]3 years ago
5 0
D 80

Because 80-30% is 24
Arisa [49]3 years ago
3 0

<u>Answer:</u>

D) 80

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

<u>30 x 80</u> = 24

  100

30/100 = 24/80

30% = 24

24 is 30% of 80

<em>Hopefully this helped! Sorry if wrong. You are loved and you are beautiful/handsome!</em>

-Bee

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What is the solution to the equation
Dafna11 [192]
\sqrt{4t+5}=3-\sqrt{t+5}\\\\D:4t+5\geq0\ \wedge\ t+5\geq0\ \wedge\ \sqrt{t+5}\leq3\\\\t\geq-\dfrac{5}{4}\ \wedge\ t\geq-5\ \wedge\ t\leq6

therefore
D:x\in\left< -\dfrac{5}{4};\ 6\right>

\sqrt{4t+5}=3-\sqrt{t+5}\ \ \ |^2\\\\(\sqrt{4t+5})^2=(3-\sqrt{t+5})^2\ \ \ |use:(a-b)^2=a^2-2ab+b^2\\\\4t+5=3^2-2\cdot3\cdot\sqrt{t+5}+(\sqrt{t+5})^2\\\\4t+5=9-6\sqrt{t+5}+t+5\ \ \ \ |-t\\\\3t+5=14-6\sqrt{t+5}\ \ \ \ |-14\\\\3t-9=-6\sqrt{t+5}\ \ \ \ |change\ signs
9-3t=6\sqrt{t+5}\ \ \ \ |:3\\\\3-t=2\sqrt{t+5}\ \ \ \ |^2\\\\(3-t)^2=(2\sqrt{t+5})^2\\\\3^2-2\cdot3\cdot t+t^2=4(t+5)\\\\9-6t+t^2=4t+20\ \ \ |-4t-20\\\\t^2-10t-11=0\\\\t^2+t-11t-11=0\\\\t(t+1)-11(t+1)=0\\\\(t+1)(t-11)=0\iff t+1=0\ \vee\ t-11=0\\\\t=-1\in D\ \vee\ t=11\notin D
Answer: t = -1.


7 0
3 years ago
Read 2 more answers
Reduce -56/-70 to lowest terms.<br> 8/10 <br> -4/5 <br> -2/3 <br> 4/5
VLD [36.1K]
This one is just common sense - you don't even have to do any work. Since there's a negative on both the top and bottom you cancel them, which eliminates both the second and third answer choices. Also, 8/10 and 4/5 are the same, but 4/5 is simplified more so that is your answer.
7 0
4 years ago
Ellie is preheating her oven before using it to bake. The initial temperature of the oven is 65° and the temperature will increa
sineoko [7]

Answer:

Temp after 6 minutes: 125 degrees              Temp after tt minutes: 65 + 10t

Step-by-step explanation:

65 x 10(6) = 125

7 0
3 years ago
The initial number of views for a blog was 10. The number of views is expected to grow at a rate of 15% per week. How many views
Norma-Jean [14]

Answer:

  • 20 views

Step-by-step explanation:

  • Initial number = 10
  • Weekly growth rate = 15% or 1.15 times

<u>Equation for this relationship:</u>

  • V(t) = 10*1.15^t, where t - number of weeks

<u>Number of views in 5 weeks:</u>

  • V(5) = 10*1.15^5 = 20 views (rounded)
5 0
3 years ago
Can someone help me with the math on my page i will mark them brainliest pls
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Answer:

I will try my best

Step-by-step explanation:

4 0
4 years ago
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