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yawa3891 [41]
3 years ago
7

Is the ordered pair (–8, –7) a solution to the equation 3x + 10 = 2y? Show your work.

Mathematics
1 answer:
Elena L [17]3 years ago
4 0

Answer:

yes

Step-by-step explanation:

Substitute x = - 8 and y = - 7 into the equation

If both sides are equal then (- 8, - 7) is a solution

left side = 3x + 10 = 3(- 8) + 10 = - 24 + 10 = - 14

right side = 2y = 2(- 7) = - 14

Since both sides are equal then (- 8, - 7) is a solution to the equation

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The perimeter of a rectangular swimming pool is 446 centimeters. The width of the pool is 7 centimeters less than the length of
Akimi4 [234]

Answer:

length = 115 cm

width = 108 cm

Step-by-step explanation:

The perimeter of a rectangular swimming pool is 446 centimeters

LEt L be the length of the pool

The width of the pool is 7 centimeters less than the length of the pool.

width = length - 7

W= L-7

Given perimeter = 446

Perimeter of rectangle = 2(length)+2(width)

446 = 2(L) + 2(W)                    we know W = L-7

446 = 2(L) + 2(L-7)    

446 = 2L + 2L - 14

Add 14 on both sides

460 = 4L

divide by 4 on both sides

L= 115

Length L= 115

Width W = L - 7 = 115 - 7= 108



5 0
3 years ago
Leftmost digit of two numbers are 8 and 3 which is greater
anastassius [24]
8. 8 is greater than 3 and is all the way to theeft. if it was to the right, you'd need more info
6 0
3 years ago
Please help me with this question
Elden [556K]

Answer:

Step-by-step explanation:

(a). SR = 15√2 km ≈ 21.2 km

R is 21.2 km due South-East of S

(b). RQ² = 35² + 15² ⇒ RQ = 5√14 km ≈ 38.1 km

R is 38.1 km due South-West of Q

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3 years ago
Plz answer as soon as possible
Mamont248 [21]
THE FIRST ONE AND THE LAST ONE
3 0
3 years ago
The roots of the equation 2x² – 5 = 0 are
Vikentia [17]

Answer:

4

Step-by-step explanation:

x = root under 5/2

so it is real and irrational number

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3 years ago
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