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8090 [49]
3 years ago
10

PLEASE HELP ME✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️ ✍️✍️✍️✍️

Mathematics
1 answer:
Lerok [7]3 years ago
6 0

1) It says he pours an equal amount into the first 7 beakers after pouring 16mL into the 8th so 70/7 = 10mL per beaker for the first 7.

2) If students rotate through 3 activites, each for 8 minutes, 3*8 = 24 minutes total. If it starts at 11:15, 24 minutes after that would be 11:39 (this represents the time they stop). If lunch starts at 12, there will be 21 minutes between the end of gym activities and the beginning of lunch.

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Need help solving pleaseee!!!
natta225 [31]

Answer:

Step-by-step explanation:

50.

line AB that has the points (2,5) and (9,2) hhas the slope

m= (y2-y1) / (x2-x1)= 5-2 / 2-9 = 3/-7 = -3/7

Parallel line have the same slope so m= -3/7 for the line that has the point (-3,4).

Point-slope equation is y-y1 = m (x-x1), y -4 = -3/4 (x+3) or

you can writte it as y= (-3/4)x - 9/4 +16/4 so y = (-3/4)x + 7/4

51.

line PQ has slope m= -6+1 / 4-6 = -5/-2 = 5/2

Perpendicular lines have their slope negative reciprocal of eachother so the line that goes trough the point (1,3) has the slope m= -2/5

y-3 = -2/5 (x-1)

5 0
2 years ago
Jerry has a miniature model of a boat. He knows that the boat is 3 3/4 inches wide and 5 1/2 inches long. What is the actual len
FromTheMoon [43]

Width of the miniature model = 3\frac{3}{4} inches

Length of the miniature model = 5\frac{1}{2} inches

The actual width of the boat = 15 feet

Let us find the actual length of the boat.

Write it in a proportion form.

width of model : length of model : : width of actual : length of actual

$\Rightarrow 3\frac{3}{4}:5\frac{1}{2}::15:x

$\Rightarrow\frac{15}{4}:\frac{11}{2}::15:x

$\Rightarrow\frac{\frac{15}{4}}{\frac{11}{2}} =\frac{15}{x}

Do cross multiplication.

$\Rightarrow{\frac{15}{4}x =15\times\frac{11}{2}

$\Rightarrow{\frac{15}{4}x =\frac{165}{2}

$\Rightarrow x =\frac{165}{2}\times{\frac{4}{15}

⇒ x = 22

Hence the actual length of the boat is 22 feet.

6 0
3 years ago
Which table represents a direct variation function?
Morgarella [4.7K]

Answer:

the 3rd one

Step-by-step explanation:

i just know

IF UR USERNAME IS A JOKE F U. if its not then i support you

5 0
2 years ago
Read 2 more answers
Carla earns $13 an hour cleaning house. How much will she earn if she works from 8:00 to 2:00?
Andreyy89
8pm to 2am, or 8am to 2pm, either way, Carla would've worked for 6 hours.

6*$13=$78

-----------

Carla would earn $78 if she were to clean for 6 hours.
4 0
2 years ago
Read 2 more answers
What is the domain of the function f(x) = 2x /(3x^2− 3
Svet_ta [14]
The domain of the function in this case will be for when the denominator is different from zero:
 3x ^ 2- 3 = 0
 3x ^ 2 = 3
 x ^ 2 = 3/3
 x ^ 2 = 1
 x = + / - 1
 Therefore the domain of this function are all reals without including x = 1 and x = -1
3 0
3 years ago
Read 2 more answers
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