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Romashka-Z-Leto [24]
3 years ago
10

What is the solution to the equation k + 4 = 7? k = 3 k = 2 1/4 k = 2 3/4 k = 3 1/4

Mathematics
2 answers:
yaroslaw [1]3 years ago
4 0

Answer:

k = 3.

Step-by-step explanation:

k + 4 = 7  Add -4 to both sides:

k + 4 - 4 = 7 - 4

k = 3.

jok3333 [9.3K]3 years ago
4 0
First step:
Get k by itself!
The opposite of adding is subtracting so u need to subtract 4 from both sides in order to get k by itself

K + 4 = 7
- 4 - 4

Second step:
Since 4 - 4 = 0, it cancels out. Now k is by itself and now you need to subtract 7 by 4

7 - 4 = 3

Answer:

K = 3
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What is the surface area of cone below Diameter AB=21 and distance from B to C =36
Vesnalui [34]

Answer:

1533.88261311522

Step-by-step explanation:

<em>Let r be the radius of the (base/circle)</em>

<em>and  L be the slant height of the cone</em>

<em>Formula ………………………………………………………………………………………………………</em>

The surface area of a cone = the (curved/lateral) surface area +  the base

                                             =\pi r^{2}\ \ \ +\ \ \ \pi Lr

=========================================

r=\frac{21}{2} =10.5

L = BC = 36

\text{surface area} =\pi \left( 10.5\right)^{2}  +\pi \times 36\times \left( 10.5\right)

                   =346.360590058275 + 1187.52202305694

                   =1533.88261311522

6 0
2 years ago
Can u please help me
Zina [86]

Option A would be the best strategy here.

4 0
3 years ago
Amy,Ruben,and Sam have a total of $71 in their wallet. Sam has 3 times what Reuben has. Reuben has $9 more than Amy. How much do
iogann1982 [59]
Total = amount Amy has(A) + amount Ruben has(R) + amount Sam has(S)
S = 3 * R
R = A + 9

S = 3 * (A+9)
S = 3A + 27

71 = A + (A + 9) + (3A + 27)
71 = 5A + 36
5A = 35
A = $7

R = A + 9
R = 7 + 9
R = $16

S = 3 * R
S = 3 * 16
S = $48
8 0
3 years ago
The Census Bureau estimates that in 2020, 15 of the 50 states will have a Spanish-speaking majority. What percent of the states
Vinvika [58]
The answer is:  [C]:  "30%" .
_____________________________________________________
Explanation:
_____________________________________________________
Note that: "%" ; or "percent" means "out of 100" ; or "divided by 100" .
______________________________________________________
Method 1) 

15/50 = ?/ 100 ;

Look at the denominators:

50 * (what value?) = 100 ? ;  → "100 ÷ 50 = 2" ;

→ 50 * 2 = 100 ;

So:  "15/50 = (15*2)/(50*2) = "30/100" ; which is "30%" .
___________________________________________
Method 2:
___________________________________________
 "15/50" = (15÷5) / (50÷5) = 3/10 ; 

3/10 = (3*10) / (10*10) = 30/100 ; which is:  "30%" .
__________________________________________
Method 3:  (slight variation of "Method 2" above):
___________________________________________
 "15/50" = (15÷5) / (50÷5) = 3/10 ; 

3/10 = 0.3 = 0.30 = (0.30 * 100) % =  " 30% " .
___________________________________________ 
4 0
4 years ago
Diego is asked to solve 3x-8=4(x+5) What do you recommend he does to each side first?
Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

Do what is in parenthesis

Attempt to find the value of x

3 0
3 years ago
Read 2 more answers
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