All categories

3 years ago

Use substitution to solve. x-5y=2 and 9x+8=32y

Mathematics

1 answer:

Flauer [41]3 years ago

6 0

Answer:

x=-8,y=-2

Step-by-step explanation:

x=2+5 y

put value of x in eq 2

9(2+5 y)+8=32 y

18+45 y+8=32 y

26=32 y-45 y

26=-13 y

y=26/-13

y=-2

put value of y in eq x=2+5 y

x=2+5(-2)

x=2-10=-8

You might be interested in

A square pyramid has a base length of 4 inches. The height of each triangular face is 12 inches. What is the surface area of the

Wittaler [7]

Answer:

The surface area of the given pyramid is 112 $inches^{2}$ .

Step-by-step explanation:

Base length of the pyramid = 4 inches

Area of the base = $length^{2}$

= $4^{2}$

= 16

Area of its base = 16 $inches^{2}$

Area of one of its triangular surface = $\frac{1}{2}$ x base x height

= $\frac{1}{2}$ x 4 x 12

= 2 x 12

= 24 $inches^{2}$

Area of all its four triangular surfaces = 4 x 24

= 96 $inches^{2}$

surface area of the pyramid = sum of areas of all its surfaces

= 16 + 96

= 112 $inches^{2}$

The surface area of the given pyramid is 112 $inches^{2}$ .

8 0

3 years ago

For the right triangle find the missing length Round your answer<br> the nearest teren

Talja [164]

Answer:

hello! i can answer in the comments if you tell me what the lengs are and where they are located! i cannot see the picture due to my school computer blocking images on the site so that's why i need the explanation. thanks :>

5 0

3 years ago

Evan randomly selects 30 marbles from a bag. His data is given in the table.

Igoryamba

The probability of selecting a yellow marble is #of yellow marbles/total # of marbles= 6/30 or .2 or 20%

If there are 300 marbles in the bag, a good estimate for the total number of red marbles in the bag is 90.

9/30=.3 = the percentage of red marbles
.3(300) = 90

3 0

2 years ago

Use ABC to find the value of cos a. 24/7 7/24 7/25 24/25

ExtremeBDS [4]

Answer:

$\frac{24}{25}$