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julia-pushkina [17]
3 years ago
12

Solve the simultaneous linear equations by using the elimination method​

Mathematics
1 answer:
neonofarm [45]3 years ago
6 0

Answer:

3a -3b= -9

3a - 4b = -5

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

b=-4

4a- 4b= -12

3a - 4b = -5

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

a = -7

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The radii of two cylinders are in the ratio 1 : 4 and their heights are in the ratio 3 : 1. The ratio of their lateral surface a
Montano1993 [528]

Answer:

a

Step-by-step explanation:

Cylinders:

Ratio of radii = 1 : 4

Radius of two cylinders are: r , 4r

Ratio of height = 3 :1

Height of two cylinders are: 3h , h

Lateral surface area of cylinder =  2πrh

Ratio of lateral surface area= 2π* r * 3h   : 2π* 4r * h

                                             = 3 : 4

8 0
3 years ago
A metal rod is placed in a rectangular box as shown in the figure. How long is the rod? Round your answer to the nearest tenth o
Alexandra [31]
Fist we find the legnth of the diagonal
a^2+b^2=c^2
3^2+4^2=c^2
9+16=c^2
25=c^2
c=5

now the other diagonal
11^2+5^2=c^2
121+25=c^2
146=c^2
sqrt both sides12.083
closest is B
7 0
3 years ago
A company sells its product for $59 per unit. Write an expression for the amount of money received (revenue R) from the sale of
zaharov [31]

Answer:

R = 59x

Step-by-step explanation:

We are given the following in the question:

Cost per unit = $59

Let x units of product be sold.

We have to write an expression the amount of money received (revenue R) from the sale of x units of the product.

Revenue:

  • It is the total income  and is obtained by multiplying the quantity of goods sold by the unit price of the goods.

Revenue =

\text{Unit Cost}\times \text{Units sold}\\R = 59x

is the required expression of revenue.

6 0
4 years ago
1 1/4 divided by 1 2/5
Degger [83]

Answer:

25/28

Step-by-step explanation:

1 1/4=5/4

1 2/5=7/5

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

(5/4)/(7/5)

(5/4)(5/7)

25/28

7 0
3 years ago
Measure the angle in degrees.
IrinaVladis [17]
Answer: 20 degrees

Have a good day :)
6 0
3 years ago
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