If Sally has x books that are 2 pounds then her x books weights a total of 2x lbs.

8 books of 3 lbs weights 8*3=24lbs

All them add up to 62, therefore we can conclude to the equation :
2x+24=62
or we can simplify to
2x=38
or even
x=19

5 0

4 years ago

What number should be placed In the box.

babunello [35]

14 * 45 = 630

The number that should be put in the box is 630

3 0

3 years ago

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tom opens a bank account and makes an initial investment of $500 the banker tells tom that he is going to recive and annula rate

aliya0001 [1]

Answer:

$950

Step-by-step explanation:

(500*6*15)/100 = 450 (applying the formula of simple interest)

450 + 500 ( adding the interest to the initial investment or princlple)

= 950 (bank balance after 15 years)

Hope this helps! :)

7 0

3 years ago

Find the measure of AngleJ, the smallest angle in a triangle with sides measuring 11, 13, and 19. Round to the nearest whole deg

Evgen [1.6K]

Answer:

34°

Step-by-step explanation:

The law of cosines is good for finding angles when only sides are known. We'll use the conventional sides a, b, c, and angles A, B, C. Yes, we know the problem statement calls the smallest angle "J". We trust you can make the translation.

a² = b² +c² -2bc·cos(A) . . . . . for sides a, b, c and angle A

Solving for the angle, we get ...

A = arccos((b² +c² -a²)/(2bc))

Filling in the numbers with "a" being the shortest side, we have ...

A = arccos((13² +19² -11²)/(2·13·19)) = arccos(409/494)

A ≈ 34.113°

The smallest angle, ∠J, is about 34°.

8 0

4 years ago

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