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just olya [345]
3 years ago
9

Can someone explain me where this 13 came from, please? (sorry my poor english i'm brazilian)

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
7 0

Hey there,

a-7=3(b+2), we do 3 times b and 3 times 2 according to the rule.

a-7=3b+6 we change + to - and - to + when move nums from 1 side to another one.

a=3b+13 we get the solution.

Hope this helps :)

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a drilling team detected water 38 feet below the ground. if it took workers 8 days to be able to dig and pull up the water, how
xz_007 [3.2K]

Answer:

On average, the workers dig 4.75ft each day. Also, what x and y questions?

Step-by-step explanation:

Take 38/8=4.75

I hope you have a great day and make me the brainliest.

3 0
2 years ago
Solve the inequality. 1/6w≥2.5
Viefleur [7K]

\dfrac{1}{6}w\geq2.5\qquad\text{multiply both sides by 6}\\\\\not6^1\cdot\dfrac{1}{\not6_1}w\geq6\cdot2.5\\\\\boxed{w\geq15}

7 0
2 years ago
Read 2 more answers
Which of the following shows a group of possible angles a triangle could have?
Delvig [45]

Answer:

C. 60 degrees, 60 degrees, 60 degrees

Step-by-step explanation:

The measures of interior angles of a triangle sum to 180°.

8 0
3 years ago
Help find y .. slope is m=-5/8
goblinko [34]

y = 8

using the ' gradient formula' m = (y₂ - y₁)/(x₂ - x₁)

with (x₁, y₁) = (3, 3), (x₂, y₂) = (- 5, y) and m = - \frac{5}{8}

(y - 3)/( - 5 - 3) = - \frac{5}{8}

(y - 3)/(-8) = - \frac{5}{8}

multiply both sides by - 8 to eliminate fractions

y - 3 = 5

add 3 to both sides

y = 5 + 3 =8


5 0
3 years ago
A train has 6 identical passenger cars that are each 18 m long.
Gnesinka [82]

Answer:

59m

Step-by-step explanation:

No of passenger cars in the train = 6

length of each passenger cars = 18m

total length of 6 passenger cars = 18 * 6 = 108 m

length of caboose = 10m

total length of train when caboose is included = 108 m + 10 m = 118m

_____________________________________________

Let the length of truck be X m

given that length of train is twice of length of truck = 2*X

but length of train as found above is 118 m

this implies

2X = 118

X = 118/2 = 59m

Therefore length of truck is 59m

5 0
3 years ago
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