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Burka [1]
3 years ago
12

Please help! Worth 30 points.

Mathematics
1 answer:
swat323 years ago
3 0

Answer:

i am not sosure but 23

Step-by-step explanation:

How many quarts of paint are needed to paint the room, if only full quarts can be purchased?

ifonly full qaurts then my anser is 23 full ones

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Suppose that 5 J of work is needed to stretch a spring from its natural length of 30 cm to a length of 39 cm.
vesna_86 [32]

Answer

given,

work = 5 J

spring stretch form 30 cm to 39 cm

W = \dfrac{1}{2}kx^2

x = 0.39 - 0.30 = 0.09 m

5 = \dfrac{1}{2}k\times 0.09^2

k = \dfrac{5\times 2}{0.09^2}

k = 1234.568 N/m

a) work when spring is stretched from  32 cm to 34 cm

x₂= 0.34 -0.30 = 0.04 m

x₁ = 0.32 - 0.30 = 0.02

W = \dfrac{1}{2}k(x_2^2-x_1^2)^2

W = \dfrac{1}{2}\times 1234.568 \times (0.04^2-0.02^2)^2

W = 0.741 J

b) F = k x

  25 = 1234.568 × x

     x = 0.0205 m

     x = 2.05 cm

3 0
4 years ago
If the radius of a circle is 24 feet, what is the diameter?<br> PLZ HRLP I HAVE TO SUMBIT IN 30 MIN
Romashka-Z-Leto [24]

Answer:

d=2r=    2·24=48ft

Step-by-step explanation:

6 0
3 years ago
Brooke has to set up 70 chairs in equal rows for the class talent show. But, there is not room for more than 20 rows. What are t
-Dominant- [34]
5 rows of 14 chairs
7 rows of 10 chairs
Or
14 rows of 5 chairs
10 rows of 7 chairs
6 0
3 years ago
Read 2 more answers
If x is a negative number, which of the following could equal the absolute value of x? Select all that apply. 3 5 0 -3
Aneli [31]
It will be a number > 0.

so 3 and 5.
7 0
4 years ago
Question 5 (1 point)<br><br> Write an equivalent expression for (m + 4n) - 2.5m
aliina [53]

Answer:

-1.5m + 4n is the equivalent expression

Step-by-step explanation:

To find the equivalent expression, we combine the like terms.

We are given the following expression:

m + 4n - 2.5m

Combining the like terms:

m - 2.5m + 4n

-1.5m + 4n is the equivalent expression

4 0
3 years ago
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