MATHEMATICS HIGH SCHOOL

Bob has some 10 lb weights and some 3 lb weights. Together, all his weights add up to 50 lbs. If x represents the number of 3 lb weights and y represents the number of 10 lb weights, which equation can be used to find the number of each type of weight Bob has?

Answers

Answer 1

Answer:

Answer:

3x=50-10y

Step-by-step explanation:

Just took the test on ed.

Answer 2

Answer:

Final answer:

The given problem is a system of equations problem. The equation that represents how many of each type of weight Bob has is 3x + 10y = 50, where x represents the number of 3 lb weights and y represents the number of 10 lb weights.

Explanation:

In this scenario, we're given that Bob has a combination of 10 lb and 3 lb weights. If we let x represent the number of 3 lb weights and y represent the number of 10 lb weights, we know that all of his weights together total 50 lbs. This information leads us to a system of equations problem.

Since the weights of the 3 lb and 10 lb weights multiplied by their respective quantities (x and y) gives us the total weight, we can summarize this in an equation. The equation 3x + 10y = 50 would represent this scenario and could be used to find the number of each type of weight Bob has.

This equation is based on the principle of weight summation: the weight of each type of weight (3 lbs and 10 lbs) times the number of each type of weight when added together should equal the total weight (50 lbs).

Learn more about System of Equations here:

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Find the inverse of f(x)=(x-1)^3

Answers

$f (x)=(x-1)^3 \n y =(x-1)^3 \n\n\sf Replace~ x ~with~ y ~and~ vice~ versa \n x = (y-1)^3 \n \sqrt[3]{x} =y-1 \n \n Solve~for~y\n\n \boxed {y= \sqrt[3]{x} +1}$

Kaleb has 5 pink, 4 yellow, 3 orange, and 3 red Starburst. What is the probability Kaleb will randomly pick a yellow Starburst, eat it, and then randomly pick another yellow Starburst?

Answers

The awnser would be 4/15 for the yellow starburst

Evaluate 2|3y-8|+y if y =2.5

Answers

2|3y-8|+y if y =2.5
2|3（2.5）-8|+2.5
2|7.5-8|+2.5
2(0.5)+2.5
1+2.5
=3.5

Subtitute value of y to the expression:

2 · |3 · 2.5 - 8| + 2.5 = 2 · |7.5- 8| + 2.5 = 2 · |-0.5| + 2.5

= 2 · 0.5 + 2.5 = 1 + 2.5 = 3.5

Which was the most important effect of the bessemer process a.it allowed the production of more steel
b. it produced better steel
c. it made steel cheaper
d. it allowed factory production of steel 2. which was the immediate goal of the standard oil company when it lowers its prices?
a. to sell stock to investers
b. to out complete rival businesses
c. to form a monopoly
d. to pass on lower costs to costomers?

Answers

Which was the most important effect of the bessemer process

d. it allowed factory production of steel

2. which was the immediate goal of the standard oil company when it lowers its prices?

b. to out complete rival businesses

Answer:

1. c

2. b

3. d

4. a

If x = - 2 and y = 3, what is the value of - x∧- y? the answer is 1/8. how?

Answers

$-x^(-y)$

You have to know that every number to negative power is the inverse, for example:

$3^(-1)=(1)/(3^1)$

in this exercise we will make the same thing

when $x=-2~~and~~y=3$

$-(-2)^(-3)$

let's do the inverse

$-(1)/((-2)^3)$

now $(-2)^3=-8$

$-(1)/(-8)$

doing the signal rule

$\boxed{\boxed{(1)/(8)}}$

$-x^(-y)\n \n -(-2)^(-3)=-(1)/((-2)^3)=-(1)/(-8)=(1)/(8)$

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. David invested $220 in a savings account that offers a 3% return on the investment. The value of David's investment will be at least $400 after a period of years. Hint: Use the formula A = P(1 + r)t, where A is the amount after t years, P is the amount invested, r is the rate of interest, and t is the time period. Use a calculator to compute the answer, and round it off to the nearest year.