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Rashid [163]
3 years ago
6

Which is a solution to the equation? (x-2)(x=5)=18

Mathematics
2 answers:
4vir4ik [10]3 years ago
8 0
I hope this helps you

kobusy [5.1K]3 years ago
6 0
Expand
x^2+3x-10=18
minus 18 both sides
x^2+3x-28=0
find what 2 numbers mutiply to -28 and add to 3
7 and -3 
(x+7)(x-3)=0
set each to zero

x+7=0
x=-7
x-3=0
x=3

x=-7 and 3
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A woman is considering two companies from which to rent a truck. triangle truck rental charges ​$20 per day and 35 cents a mile.
Nikitich [7]

You can solve this question using two different methods. One is obviously a hit and trial method in which you keep guessing a number which gives the same amount of total cost. Second is forming two different equations and then solving them using simultaneous methods learnt.

The correct answer is 75 miles. I used the hit and trial method. You can see 20 + 75 * 0.35 = 46.25 and similarly 35 + 75 * 0.15 = 46.25. Hence the same cost.

7 0
2 years ago
An angle is 21 degree more than twice its complement find it
jekas [21]

Answer: 67°

Step-by-step explanation:

Complementary angle refers to the angle that when added together will be equal to 90°.

Let the measurement of the angle's complement be x.

Therefore, the angles are x and 2x + 21. Since it's a complementary angle, therefore,

x + 2x + 21 = 90

3x + 21 = 90

3x = 90 - 21

3x = 69

x = 69°/3

x = 23°

Therefore, the angle will be:

= 2x + 21

= 2(23°) + 21°

= 46° + 21°

= 67°

The angle is 67°.

5 0
3 years ago
Find the area of the rectangle.<br> 36<br> kilometers<br> (x-3) kilometers
Vika [28.1K]

Answer:

36x - 108 kilometers²

Step-by-step explanation:

Area = length x width

36 ( x - 3 ) =

36x - 108

-Chetan K

3 0
2 years ago
The sum of x and 3/5 is 5/7.
crimeas [40]
We first write the word in math as x+3/5 = 5/7.  Now we cross multiply our fractions and rewrite them with the LCD of 5 and 7. Our equation now looks like x + 21/35 = 25/35.  We simplify our equation by subtracting 21/35 from both sides to get x = 4/35. 4/35 is already in lowest terms so it is our answer.
7 0
3 years ago
Read 2 more answers
What is the total surface area of the rectangular pyramid below
Novosadov [1.4K]

Answer:

<h2>S.A. = 225 ft²</h2>

Step-by-step explanation:

We have

the rectangle 12ft × 6ft

two triangles with the base b = 12ft and the height h = 8ft

two triangles with the base b = 6ft and the height h = 9.5ft.

The formula of an area of a rectangle l × w:

A=lw

Substitute:

A_1=(12)(6)=72\ dt^2

The formula of an area of a triangle:

A=\dfrac{bh}{2}

Substitute:

A_2=\dfrac{(12)(8)}{2}=48\ ft^2

A_3=\dfrac{(6)(9.5)}{2}=28.5\ ft^2

The Surface Area:

S.A.=A_1+2A_2+2A_3

Substitute:

S.A.=72+2(48)+2(28.5)=225\ ft^2

5 0
3 years ago
Read 2 more answers
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