When Lena went to her friend's sleepover on Friday night, the temperature was –
7°F. By the next morning, the temperature had risen to
–
1°F.
What was the change in temperature during the sleepover?

Answers

Answer 1

Answer:

The change in temperature during Lena's sleepover was 6°F. It can therefore be said that the temperature rose by 6°F during the sleepover.

How do we calculate the change in temperature?

To find the change in temperature, subtract the initial temperature from the final temperature, in other words, Subtract the temperature on Friday night from the temperature on Saturday morning.

Change in temperature = Final temperature - Initial temperature

Change in temperature = (−1°F) - (−7°F)

Change in temperature = −1 + 7

Change in temperature = 6°F

So, the temperature rose by 6°F during the sleepover.

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Answer 2

Answer:

Answer:

Step-by-step explanation:

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Solve this system of linear equations. Separatthe x- and y-values with a comma.9x - 10y = -343x - 4y = -16

PLEASE ANSWER!!!!!!!! Which system of equations does this graph represent? Linear graph and parabola. They intersect at 2, negative 1 and negative 3, 4 (1 point) A. y = x2 − 5 y = −x + 1
B. y = x2 − 5 y = −x − 1
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Answers

Answer:

Option (A)

Step-by-step explanation:

For equation of the line,

Let the equation is, y = mx + b

Slope 'm' of the line passing through two points (-3, 4) and (2, -1),

m = $(y_2-y_1)/(x_2-x_1)$

= $(4+1)/(-3-2)$

= -1

y-intercept of this line, b = 1

Now we substitute these values in the equation,

y = -x + 1

Let the equation of the parabola is,

y = a(x - h)² + k

Here, (h, k) is the vertex of the parabola,

Since vertex of the given parabola is (0, -5),

then the equation will be,

y = a(x - 0)²- 5

y = ax² - 5

Since a point (2, -1) lies on this parabola,

-1 = a(2)² - 5

5 - 1 = 4a

a = 1

Equation of the parabola will be,

y = x² - 5

Therefore, Option (A) will be the answer.

Twenty percent of the town's population is over the age of 65. If there are 320 residents over the age of 65, what is the town's total population?

Answers

Answer:

There are 1600 residents.

Step-by-step explanation:

0.2 times x = 320 divide by 0.2

x = 1600

Answer:

Step-by-step explanation:

I think. hope this hepls

1) A 15 foot flagpole casts an 11 foot shadow. At the exact same time a 28 foot tree casts a shadow. Which proportion would correctly find the length of the tree's shadow? A) x 28 = 11 15 B) x 28 = 15 11 C) 28 x = 11 15 D) x 15 = 11 28

Answers

The model involves similar triangles with the ratios of corresponding sides being equal

let x be the length of the tree's shadow, then

$(28)/(15)$ = $(x)/(11)$ ( cross- multiply )

15x = 11 × 28

Answer:

Step-by-step explanation:

i went to K12

What is the value of x? 2.5x = 35 x = 14 x = 16

Answers

The value of X is 14. It is 14 because two point 2.5×14 = 35!

A Triangle has an angle that measures 137.3 degrees. The other two angles are in a ratio of 3:4. What are the measures of those two angles?

Answers

so we start off by subtracting 137.3 from 180 getting 42.5. If you add the ratios up (3+4) you get 7 and 7 should equal 42.5. thus,

42.5/7= 85/14

(85/14)*3=18.2 or (255/14 to be exact)
(85/14)*4= 24.29 or (170/7 to be exact)

How do you do this 6-2x=10

Answers

-2x=10-6

The answer: x= -2

Answer:

x= -2

Step-by-step explanation: (remember the 6 in this equation is positive so you'll subtract it and the 2 is actually -2x. First, you'll subtract 6 from itself and 10, the two 6's cancel out and 10-6=4. Then, you'll divide -2 and 4 by -2, the two -2's cancel out and 4 divided by -2 is -2. Finally, you'll see that x = -2. This is all done by the order of operations also known as PEMDAS. )

6 - 2x =10

-6 -6

-----------------

-2x = 4

------------

-2 = -2

x = -2

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