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loris [4]
3 years ago
10

solve this system of linear equations separate the x and y values with a comma -14x=-7-7y -10x=-15-7y

Mathematics
2 answers:
andrew11 [14]3 years ago
8 0
-14x = -7 - 7y
-10x = -15 - 7y...multiply by -1
---------------
-14x = -7 - 7y
10x = 15 + 7y (result of multiplying by -1)
-------------add
-4x = 8
x = -8/4
x = -2

-10x = -15 - 7y
-10(-2) = -15 - 7y
20 = -15 - 7y
20 + 15 = -7y
35 = -7y
-35/7 = y
-5 = y

solution is (-2,-5)
gizmo_the_mogwai [7]3 years ago
7 0
X=7/4+7/4y ,y∈ (One symbol I can't find but that's what I got)
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Is the sequence 3,6,9,12 geometric? True or false and why
IRINA_888 [86]
This sequence is not a geometric.
It is because, common ratio = 6/3 = 2
9/6 = 1.5

As the ratio's are not same, it is not a G.P

Hope this helps!
7 0
3 years ago
PLEASE HELP!! WILL MARK BRAINLY
lianna [129]

Answer:

arc length = 84.82 cm

Step-by-step explanation:

arc length = 36 * 3π/4

arc length = 3π * 9

arc length = 84.82 cm

Hope this helps!

4 0
3 years ago
In Virginia, 120 lame dogs were tested for arthritis and Lyme disease. The results showed that 42 of the dogs had Lyme disease,
miskamm [114]

Answer:

The number of dogs that had both Lyme disease and arthritis is 18

Step-by-step explanation:

Let x represent dogs that have both Lyme disease and arthritis

Dog with only Lyme disease = 42 - x

Dog with only arthritis = 96 - x

The sum of the 3 category should give 120

x + (42 - x) + (96 - x) = 120

Collect like terms and solve

x - x - x + 42 + 96 = 120

-x + 138 = 120

138 - 120 = x

x = 18

Dog with only Lyme disease = 42 - x = 42 - 18 = 24

Dog with only arthritis = 96 - x = 96 - 18 = 78

Therefore, the number of dogs with both Lyme disease and anthritis is 18.

4 0
4 years ago
To feed 7 horses for 4 days, Mark needs 420 kg of grass. How many kilograms of grass does Mark need to feed 9 horses for 6 days?
Nataly [62]
2+2 = 4s44444444444rrrrrrr
6 0
3 years ago
4 (x+2) = 2x+10<br> help
xenn [34]

Answer:

x=1

Step-by-step explanation:

First you would do the parentheses.

So, 4 x X= 4x

4x2=8

4x+8=2x+10

subtract 2x on both sides

2x+8=10

subtract 8 from both sides

2x=2

x=1

6 0
3 years ago
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