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1 year ago

9Find -18 + (-67). Show your work.

Mathematics

1 answer:

polet [3.4K]1 year ago

3 0

Answer:

-85

Explanation:

Given the mathematical expression:

$-18+(-67)$

First, we recall the product of signs.

$+\times-=-$

So, first, we open the bracket:

$-18+(-67)=-18-67$

We then simplify:

$=-85$

The result is -85.

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Find the solution to the system of equations x + y = 9 and x - y = -1.

Galina-37 [17]

Answer:

(4, 5 )

Step-by-step explanation:

x + y = 9 → (1)

x - y = - 1 → (2)

adding the 2 equations term by term will eliminate y

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2x = 8 ( divide both sides by 2 )

x = 4

substitute x = 4 into either of the 2 equations and solve for y

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1 year ago

Read 2 more answers

12. A carpenter made two tables. The first table is 4 feet

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Answer:

a. True

b. True

c. False

d. False

Step-by-step explanation:

<u>First Table</u>

Length=10 feet, Width=4 feet

Area =10 X 4=40 Square Feet

<u>Second Table</u>

The second table is half as long as the first table.

Length =0.5 X 10 =5 feet

Area=5 X Width= 5w

The area of the second table is one fourth the area of the first table.

Area of Second Table = $\frac{1}{4}$ X Area of first table

5w= $\frac{1}{4}$ X 40

5w=10

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The following are true.

(a)The width of the second table is 2 feet.

(b) The area of the second table is 10 square feet.

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2 years ago

How to turn 1.15 as a decimal into a percentage

Valentin [98]

Multiply the number by 100, making this one 115%

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2 years ago

Three times a number, X, increased by four is equal to five times the number, x. Which equation can be used to solve for x

WITCHER [35]

Answer:

Step-by-step explanation:

Three times a number x : 3x

Three times a number x increase by 4: 3x +4

Five times the number x: 5x

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Subtract 3x from both the sides.

5x - 3x = 3x +4 - 3x

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2 years ago

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snow_tiger [21]

Answer: 65%

$\frac{3250}{5000} * 100 \\13/20 *100 = 65%$

Step-by-step explanation:

To get the percentage of the seats in the theatre were filled by the 6th graders on the trip,

it will be

$\frac{occupied seats}{total seats} * \frac{100}{1}$

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3 years ago