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3 years ago

Which situation can be modeled by the inequality 65−8x≥9?

Mathematics

2 answers:

Klio2033 [76]3 years ago

5 0

Answer:

x is less than Or equal to 7

Step-by-step explanation:

Rzqust [24]3 years ago

3 0

Answer:

You have $65 to spend on food while on a trip, but you need to save at least $9 for the train ride home. You plan to spend the rest on food that costs $8 each meal (including tax).

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when the temperature is 68 F, the speed of sound in air is approximately 343 meters per second. Approximately how many kilometer

Digiron [165]

Hello!

Since we are given that the speed of sound in the air travels about 343 meters per second, we can multiply 343 meters per second by 5, and then we convert the meters to kilometers.

343 · 5 = 1715 meters per 5 seconds.

1000 meters are equal to 1 kilometer. So, we can divide 1715 by 1000 to convert meters to kilometers.

1715 / 1000 = 1.715

Therefore, the speed of sound in air is about 1.715 kilometers per 5 seconds.

6 0

3 years ago

Read 2 more answers

6 pages every 1/5 hour in unit rates

Alecsey [184]

Answer:

30 pages per hour

Step-by-step explanation:

6 pages per 1/5 hour

6 x 5 = 30

1/5= one whole would be five parts

8 0

3 years ago

Solve the system of equations by substitution. 3/8 x + 1/3 y =17/24 and x + 7y = 8

goblinko [34]

$\left \{ {{ \frac{3}{8}x+ \frac{1}{3}y = \frac{17}{14} } \atop {x+7y=8}} \right.$

To solve this system by substitution, first isolate x in the second equation.

$x+7y=8$
$x+7y-7y=8-7y$
$x=8-7y$

Now, plug this expression ( $8-7y$ ) for x in the top equation to solve for y.

$\frac{3}{8} (8-7y)+ \frac{1}{3} y= \frac{17}{14}$
$3- \frac{21}{8} y+ \frac{1}{3} y= \frac{17}{24}$
$72-63y+8y=17$
$72-55y=17$
$-55y=17-72$
$-55y=-55$
$y=1$

Now that you have y, plug it into the second equation and solve for x.

$x+7y=8$
$x+7(1)=8$
$x+7=8$
$x=1$

Last step is to plug your x- and y-values in to both equations to check your work.

$\frac{3}{8} (1)+ \frac{1}{3} y= \frac{17}{24}$

$\frac{3}{8} * \frac{3}{3} = \frac{9}{24} ; \frac{1}{3} * \frac{8}{8} = \frac{8}{24}$

$\frac{9}{24} + \frac{8}{24} = \frac{17}{24}$ <--True

$1+7(1)=8$
$1+7=8$ <--True

Answer:
$x=1 \\ y=1$

5 0

4 years ago

New friends anyone?????????

nadya68 [22]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A bag contains 10 red marbles, 6 blue marbles, and 4 green marble.

Salsk061 [2.6K]

Answer:

7/10 or 70%.

Step-by-step explanation:

There is a total of 20 marbles in the bag.

There are 10 + 4 = 14 marbles which are not blue.

The required probability = 14/20

= 7/10.

6 0

3 years ago