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3 years ago

4. Which value is a solution to the inequality? 4x − 7 > 5

Mathematics

1 answer:

Shalnov [3]3 years ago

8 0

The answer is 3 because you have to do inverse operation on inequalities.

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A desk is on sale for 629$ which is 85% of the regular price. what is the regular price?

garik1379 [7]

Answer:

$740.00

Step-by-step explanation:

85% of x is 629

Translate into algebra. Use a decimal in place of the percent:

.85x = 629

Divide by .85

x = 740

This answer makes sense because the regular price should be a little higher than the sale price. If they are paying 85% they're only getting 15% off.

Check:

740×.85 = 629

3 0

1 year ago

Read 2 more answers

Find f^-1,f^-1(-8), and (f^-1. f)(4) for the given function.

Liula [17]

f is defined as

• f(4) = -8

• f(-7) = -1

• f(-5) = -4

This means the inverse is defined as

• f ⁻¹(-8) = 4

• f ⁻¹(-1) = -7

• f ⁻¹(-4) = -5

3 0

2 years ago

A jar contains n nickels and d dimes. There are 18 coins in the jar, and the total value of the coins is $1.15. How many nickels

Lyrx [107]

Answer:

There are <u>13</u> nickels and <u>5</u> dimes in the jar.

Step-by-step explanation:

Total number of coins = 18

Number of nickels = $n$

Number of dimes = $d$

Therefore $n+d=18$

Total value of coins = $1.15

Value of $n$ nickels = $ $0.05n$

Values of $d$ dimes = $ $0.10d$

therefore $0.05n+0.10d=1.15$

We have a system of equation to solve

(1) $n+d=18$

(2) $0.05n+0.10d=1.15$

Multiplying equation (2) with $-10$

$-0.5n-d=-11.5$

Now adding it to equation (1)

$n+d=18$

$-0.5n-d=-11.5$

We get $0.5n=6.5$

Dividing both sides by $0.5$

$\frac{0.5n}{0.5}=\frac{6.5}{0.5}$

∴ $n=13$

Plugging value of $n$ in equation (1).

$13+d=18$

Subtracting both sides by 13.

$13+d-13=18-13$

∴ $d=5$

Therefore there are 13 nickels and 5 dimes in the jar.

4 0

3 years ago

The scale of a model train is 1 inch to 11.5 feet. One of the cars of the model train is 5 inches long. What is the length, in f

Alekssandra [29.7K]

Answer:

57.5

Step-by-step explanation:

5 0

2 years ago

suppose you want to fill a pot with 1 gallon of water. You can use a measuring cup the size of a cup or a quart. which would be

sesenic [268]

The best one to use would be the quart measuring cup because it is bigger so it would fill up the pot faster

3 0

2 years ago

Read 2 more answers