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Serhud [2]
3 years ago
7

Last year, the school library had a total of x books. Over the summer, the library acquired another 31 books and now has a total

of 1,867 books. Which equation could be used to find x, the number of books the library had last year? A. x + 31 = 1,867 B. x - 31 = 1,867 C. 1,867 + x = 31 D. 31x = 1,867
Mathematics
1 answer:
tester [92]3 years ago
6 0

Answer:

A is your answer.

Step-by-step explanation:

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If r> 0 and r^t = 6.25r^t+2, then r =
Firdavs [7]
I'm going to use n instead of t

rⁿ=6.25rⁿ+2
minus rⁿ both sides
0=5.25rⁿ+2
minus 2 both sides
-2=5.25rⁿ
divide both sides by 5.25
-2/5.25=rⁿ
take the nth root of both sides
\sqrt[n]{\frac{-2}{5.25}}= \sqrt[n]{r^n}
\sqrt[n]{\frac{-2}{5.25}}= r
4 0
3 years ago
If f(x) = x² + 7, what is the value of f(4)?
dalvyx [7]

Value of f(4) is f(4)= 23 given f(x)= x^2+7

Step-by-step explanation:

We are given f(x)= x^2+7 and we need to find value of f(4)

Solving:

We will put x=4 and solve the given equation:

f(x)= x^2+7

f(4)= (4)^2+7

We know (4)^2=16

f(4)= 16+7

f(4)= 23

So, Value of f(4) is f(4)= 23 given f(x)= x^2+7

Keywords: Solving Equations

Learn more about Solving Equations at:

  • brainly.com/question/1563227
  • brainly.com/question/2403985
  • brainly.com/question/11229113

#learnwithBrainly

4 0
3 years ago
Margit works in a factory. She receives a salary of $12 per hour and piecework pay of 12 cents per unit produced. Last week she
lilavasa [31]

Answer:

d is 456

a is 90.60

b is 14.38

4 0
2 years ago
Tisha saves $37 in September. She saved 34 in October and 24$ in November. Then Tisha spent 63$ on a a video game. How much mone
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Tisha has $32 left out of $95
3 0
3 years ago
Please help me <br> I have to solve the triangle with the law of sines
Nikitich [7]

Check the picture below.

and since a triangle has a sum of 180° for all interior angles.

A = 180 - 39.34 - 25

A = 115.66

\bf \cfrac{sin(25^o)}{44}=\cfrac{sin(A)}{a}\implies \cfrac{sin(25^o)}{44}=\cfrac{sin(115.66^o)}{a} \\\\\\ a\cdot sin(25^o)=44\cdot sin(115.66^o)\implies a=\cfrac{44\cdot sin(115.66^o)}{sin(25^o)} \\\\\\ a\approx 93.8452\implies \stackrel{\textit{rounded up}}{a = 93.85}

make sure your calculator is in Degree mode.

7 0
3 years ago
Read 2 more answers
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