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satela [25.4K]
4 years ago
14

Evaluate... k/2 + 9 = 30

Mathematics
2 answers:
Scrat [10]4 years ago
8 0
Given: K/2+9=30
Or, k/2=30-9
K/2=21
K=21*2
K=42
Simora [160]4 years ago
4 0

Answer:

K = 42

Step-by-step explanation:

K/2 = 21

2* k/2 =2*21

k=42

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Y=5x+2 and 3x=-y+10 what is the soluion of equation
Harlamova29_29 [7]
I hope this is the answer you want

4 0
3 years ago
Read 2 more answers
Which of the graphs below correctly solves for x in the equation −x2 − 3x − 1 = −x − 4?
gtnhenbr [62]

Answer:

Graph of quadratic opening downward and linear sloping up to the left. They intersect at point negative 3, negative 1 and point 1, negative 5

Step-by-step explanation:

we have

-x^{2} -3x-1=-x-4

we can separate the expression above into two equations

y=-x^{2} -3x-1 ----> equation A

This is a quadratic equation ( vertical parabola) open downward (the leading coefficient is negative)

y=-x-4 ----> equation B  

This is a linear equation with negative slope (decreasing function).so linear sloping up to the left

The solution of the original expression are the x-coordinates of the intersection point both graphs

using a graphing tool

The intersection points are (-3,-1) and (1,-5)

see the attached figure

4 0
3 years ago
Let c = 10.Which expression makes the comparison true.
den301095 [7]

Answer:

c² - 63

Step-by-step explanation:

4c - 10 = 30

3c ÷ 3 = 10

c² - 63 = 37

c² ÷ 10 = 10

Since c² - 63 = 37 and c + 25 = 35, 37 is greater than 35 so it would make sense to choose c² - 63 as the answer.

c + 25 < 37

I hope this helps you :D

3 0
3 years ago
A ticket cost T pounds (£). write down, in terms of T, the cost of the ticket in pence??
Deffense [45]
100p = £1
so 
so you multiply T by 100 to get the value in pence
100T = £T
4 0
4 years ago
Someone help me please. I don't just want the answer, I need an explanation on how it's done too.​
NARA [144]

Answer:

Below.

Step-by-step explanation:

f) (a + b)^3 - 4(a + b)^2  

The (a+ b)^2 can be taken out to give:

= (a + b)^2(a + b - 4)

= (a + b)(a + b)(a + b - 4).

g)  3x(x - y) - 6(-x + y)

=  3x( x - y) + 6(x - y)

= (3x + 6)(x - y)

= 3(x + 2)(x - y).

h) (6a - 5b)(c - d) + (3a + 4b)(d - c)

=  (6a - 5b)(c - d) + (-3a - 4b)(c - d)

= -(c - d)(6a - 5b)(3a + 4b).

i)  -3d(-9a - 2b) + 2c (9a + 2b)

= 3d(9a + 2b) + 2c (9a + 2b)

=  3d(9a + 2b) + 2c (9a + 2b).

= (3d + 2c)(9a + 2b).

j)  a^2b^3(2a + 1) - 6ab^2(-1 - 2a)

=  a^2b^3(2a + 1) + 6ab^2(2a + 1)

= (2a + 1)( a^2b^3 + 6ab^2)

The GCF of a^2b^3 and  6ab^2 is ab^2, so we have:

(2a + 1)ab^2(ab + 6)

= ab^2(ab + 6)(2a + 1).

4 0
3 years ago
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