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3 years ago

X = 1 and y = -3 satisfy x - 2y = 5 True or false

Mathematics

2 answers:

hoa [83]3 years ago

5 0

Answer:

false

Step-by-step explanation:

Given x- 2 y =5 .......(1)

put x=1 and y= -3 on left hand side of given equation

1 - 2 (-3) = 5

1 + 6 = 5

7 ≠ 5

both sides are not equal

so it is false

Vanyuwa [196]3 years ago

5 0

Answer:

false

Step-by-step explanation:

x - 2y = 5

when x = 1, and y = -3

1 -2(-3) = 5

1 + 6 = 5

7 ≠ 5

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Tom decides to paint one wall in his room green. Use the dimensions below to calculate the area of the this wall.

Anton [14]

Option C:

Area of the wall $=94\frac{15}{16}$ square feet

Solution:

Length of the wall = $12 \frac{1}{4}$ feet

Width of the wall = $7 \frac{3}{4}$ feet

Area of the wall = length × width

$$=12 \frac{1}{4}\times 7 \frac{3}{4}$

Convert mixed fraction into improper fraction.

$$=\frac{12 \times 4+1}{4}\times \frac{7\times 4+3}{4}$

$$=\frac{49}{4}\times \frac{31}{4}$

$$=\frac{1519}{16}$

Convert improper fraction into mixed fraction.

$$=94\frac{15}{16}$

Area of the wall $=94\frac{15}{16}$ square feet

Option C is the correct answer.

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3 years ago

The perimeter of a rectangle is 20 inches.The length is 2 inches less than twice the width.

SSSSS [86.1K]

Answer:

width = 6

length = 4

Step-by-step explanation:

perimeter = 2L + 2W

L = W - 2

plug in perimeter:

20 = 2L + 2W

you know the length is 2 less than the width

plug in (w - 2) for L:

20 = 2(w - 2) + 2w

solve for w:

20 = 2w - 4 + 2w

20 = 4w - 4

4w = 24

w = 6

now plug in 6 for w in either equation, whichever is easier to solve:

L = 6 - 2

L = 4

width = 6

length = 4

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4 years ago

Carter has 37 coins, all nickels and dimes in his piggy bank. The value of the coins is $3.10. How many dimes does Carter have?

Sergio039 [100]

Carter has 25 dimes. He has 12 nickels.

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3 years ago

A polynomial function has a zero at 4 (multiplicity 3) and 0 (multiplicity 1)

Maslowich

Answer:

Y=3x(x-4)

Step-by-step explanation:

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3 years ago

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zloy xaker [14]

589, 310

The 8 value is in the 10,000s place.

598, 301

The 8 is in the 1000s place.

So the difference of 10,000 over 1000 is 10

So your answer is B

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3 years ago