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adoni [48]
3 years ago
15

Eric took a test. All the questions have equal value. He answered 38 of the questions correctly.

Mathematics
2 answers:
Archy [21]3 years ago
7 0

Answer:

72% your welcome lolbrhdhhdvdceuegcstditdti

sveticcg [70]3 years ago
3 0
I believe the answer is 40. Each question is about 2.5 points each (95/38= 2.5) and when you multiply that by 40 you get a 100
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Francesca tried to evaluate an expression. Here is her work: 3(5)2–18÷3 = 3(25)–18÷3 = 75–18÷3 = 57÷3 = 19 Is Francesca's work c
hram777 [196]

Answer:

Nope. Moltiplication (and thus divisions) has to be done before any addition or subtractions, unless parenthesis indicate otherwise.

3(5)^2 - 18\div 3 = 3(25) - 6 = 75-6=69

5 0
2 years ago
Find Sin (BAC+30) 80POINTS
Ann [662]

Answer:

\dfrac{2}{5}\sqrt{3}+\dfrac{3}{10}

Step-by-step explanation:

<u>Trigonometric Identities</u>

\sin (A \pm B)=\sin A \cos B \pm \cos A \sin B

<u>Trigonometric ratios</u>

\sf \sin(\theta)=\dfrac{O}{H}\quad\cos(\theta)=\dfrac{A}{H}\quad\tan(\theta)=\dfrac{O}{A}

where:

  • \theta is the angle
  • O is the side opposite the angle
  • A is the side adjacent the angle
  • H is the hypotenuse (the side opposite the right angle)

Using the trig ratio formulas for cosine and sine:

  • \cos (\angle BAC)=\dfrac{12}{20}
  • \sin (\angle BAC)=\dfrac{16}{20}

<u>Angles</u>

\sin (30^{\circ})=\dfrac{1}{2}

\cos (30^{\circ})=\dfrac{\sqrt{3}}{2}

Therefore, using the trig identities and ratios:

\begin{aligned}\sin (\angle BAC + 30^{\circ}) & = \sin (\angle BAC) \cos (30^{\circ})+\cos (\angle BAC) \sin (30^{\circ})\\\\& = \dfrac{16}{20} \cdot \dfrac{\sqrt{3}}{2} + \dfrac{12}{20} \cdot \dfrac{1}{2}\\\\& = \dfrac{16}{40}\sqrt{3}+\dfrac{12}{40}\\\\& = \dfrac{2}{5}\sqrt{3}+\dfrac{3}{10}\end{aligned}

3 0
1 year ago
Read 2 more answers
What is the domain of this relation (1,3) (2,5) (0,1) (-1,-1 )
Andru [333]
Domain:1,2,0,-1


Here u go
4 0
2 years ago
Read 2 more answers
Please help I’m being timed!!! A country commits to decreasing spending for infrastructure in various ways at a rate of 30% per
Cerrena [4.2K]

Answer:

It would be the graph that has point (0,12) and is decreasing to the right.

6 0
3 years ago
Somebody please help me answer this
nata0808 [166]

Answer:

D

Step-by-step explanation:

When somethin is decreasing you would subtract the percent it was decreasing by, by 1.

.024 - 1 = .976

7 0
3 years ago
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