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3 years ago

What is the solution to the system of equations below?

Mathematics

1 answer:

lisov135 [29]3 years ago

5 0

Its either -1,2 or 1,2

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A car travels at a steady speed. It covers 60km in 40 minutes. How far will it travel in 3 hours, assuming it continues at the s

Alexxandr [17]

Answer:

270km

Step-by-step explanation:

3 hours is 180 minutes

40 minutes - 60km

180 minutes - x km

x = 180/40 * 60 = 270km (the speed is 90km/h)

3 0

3 years ago

Explain what the inequality --4h <-14 represents. What value of h makes the equation true

KonstantinChe [14]

Answer:

-4h < - 14

We solve for h by applying the inverse operations;

The inverse operation of multiplication is division, so we divide by -4 on both sides;

/-4 /-4

h < 3.5, it could be 3.4, 3.3, 3.2 3.123, 2.4, 2.576, there are tons of numbers below 3.5.

So anything below 3.5 would best be suitable for the equation.

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3 years ago

Robin purchased 3 1\2 ounces of whole wheat cereal for $1.40. What is the cost per ounce?

Natalka [10]

The answer is 40 cents

8 0

3 years ago

What is 5 divided by 2

vodka [1.7K]

5 divides by 2 is 2.5 I hope that hekos

5 0

3 years ago

Read 2 more answers

Please help with 6 and 7

Ilya [14]

Answer:

6. The number is $-5$

7. The two numbers are $10$ and $11$

Step-by-step explanation:

Question six can be re-worded to create the following expression:

$-2=\frac{4x+10}{5}$

Solve for x to find the number:

$-2=\frac{4x+10}{5}\\-10=4x+10\\-20=4x\\\frac{-20}{4} = x\\-5 = x$

Question seven can be solved by first listing the constraints (assuming x is smaller than y):

x and y are less than 20
$x + 1 = y$
$3x - 8 = 2y$

To get the numbers, we can create a system of linear equations. First, solve for $y$ in each expression:

$y = x+1$

$2y = 3x-8\\y = \frac{3}{2}x - 4$

Solve for $x$ :

$x+ 1 = \frac{3}{2}x - 4\\x + 5 = \frac{3}{2}x\\5 = \frac{3}{2}x - x\\5 = \frac{1}{2}x\\10 = x$

Solve for $y$ :

$y = x + 1\\y = 10 + 1\\y= 11$

4 0

2 years ago

Read 2 more answers