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Readme [11.4K]
2 years ago
15

5.

Mathematics
2 answers:
nalin [4]2 years ago
6 0

Answer:

B. -111

Step-by-step explanation:

y = -4x^2 - 3x + 4

x = 5

y = -4(5)^2 - 3(5) + 4

y = -4(25) - 15 + 4

y = -100 - 15 + 4

y = -111

...............................................................................................................................................

Please, write -4x^2 (not 04x2).

Then the quadratic model is y = -4x^2 - 3x + 4.

Now substitute 5 for x:  y(5) = -4 (5)^2 - 3(5) + 4

Simplifying,                     y(5) = -4(25) - 15 + 4 = -100 - 11 = -111.

SVETLANKA909090 [29]2 years ago
4 0
You should try C I’m not sure but try I guess!
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Two professional gamers subscribe to twitch streamers. Jonah has 430$ saved up, and spends 45$ a month on
Wewaii [24]

Answer:

A) 430-45m = 310-25m

B) 6 months

Step-by-step explanation:

A) for Jonah, the equation would be 430-45m

Because the money is being spent on the subs, you subtract that from his original savings.

The same thing is said for Rodrick, but his equation would be 310-25m

to find out the number of months it will take for both gamers to have the

same amount of money left, you set their equations equal to each other:

430-45m = 310-25m

B) you solve for m.

430-45m = 310-25m

first by subtracting 310 on both sides to get:

430-310-45m=-25m

120-45m=-25m

then add 45m on both sides because we cant have negative months

120=-25m+45m

120=20m

divide by 20 on both sides to get the number of months

\frac{120}{20} =\frac{20m}{20}

m=6

7 0
3 years ago
En un hotel hay 67 habitaciones entre dobles y sencillas, si el número de camas es 92. ¿Cuántas habitaciones hay de cada tipo?​
Alina [70]

Answer:

25 dobles y 42 sencillas

Step-by-step explanation:

25 x 2 = 50 camas + 42 = 92

y 25 habitaciones dobles + 42 sencillas = 67

7 0
3 years ago
Would 2/5x+6/5=y be a proper answer format(i just want to know if it can be =y)
lukranit [14]

yes, it does not matter if the y is at the beginning or at the end. However, most teachers usually prefer to have the y at the beginning as it is easier to read.

6 0
3 years ago
Mrs Leon bought 6 rolls of toilet paper and 5 bottles of hand sanitizer for $32. Ms Ramirez bought 4 rolls of toilet paper and 1
zlopas [31]

Answer:

The cost of a roll of toilet paper is <u>$2</u> and the cost of a bottle of hand sanitizer is <u>$4</u>.

Step-by-step explanation:

Given:

Mrs Leon bought 6 rolls of toilet paper and 5 bottles of hand sanitizer for $32.

Ms Ramirez bought 4 rolls of toilet paper and 1 bottle of hand sanitizer for $12.

Now, to find the cost for each item sold.

Let the cost of a roll of toilet paper be x.

And the cost of a bottle of hand sanitizer be y.

So, the cost of 4 rolls of toilet paper and 1 bottle of hand sanitizer:

4x+y=12\\\\y=12-4x\ \ \ \ .....(1)

Now, the cost of 6 rolls of toilet paper and 5 bottles of hand sanitizer:

6x+5y=32

Substituting the value of y from equation (1):

6x+5(12-4x)=32

6x+60-20x=32

60-14x=32

<em>Subtracting both sides by 60 we get:</em>

<em />-14x=-28<em />

<em>Dividing both sides by -14 we get:</em>

x=2.

<u>The cost of a roll of toilet paper = $2.</u>

Now, substituting the value of x in equation (1):

y=12-4x\\\\y=12-4\times 2\\\\y=12-8\\\\y=4.

<u>The cost of a bottle of hand sanitizer = $4.</u>

Therefore, the cost of a roll of toilet paper is $2 and the cost of a bottle of hand sanitizer is $4.

7 0
3 years ago
Jamie’s father has asked him to paint the fence around their home. If the fence is 119.5 years long, and Jamie can paint an aver
Citrus2011 [14]

Answer:

25 hours

Step-by-step explanation:

119.5 yards divided by 4.78 yards per hour = 25 hours

3 0
3 years ago
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