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4 years ago

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7

Mathematics

2 answers:

Nimfa-mama [501]4 years ago

8 0

Replace x and Y with the given values:

-8 - 6(-6) = -8 - -36 = -8 +36 = 28

-7 +7 = 0

timofeeve [1]4 years ago

6 0

Answer:

-8-6*6 = 28

-7+7=0

so, 28+0 = 28

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A bowl contains 15 granola bars and 10 fruit bars.

horsena [70]

Granola bars to fruit bars....
15 / 10 reduces to 3/2 in simplest form......so its 3/2, or 3:2, or 3 to 2

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3 years ago

Suppose a car uses one gallon of gasoline for every 20 miles traveled.

anzhelika [568]

The miles that can be travelled in the car on $30 gasoline is 240 miles (option A).

<h3>How many miles can the car travel?</h3>

The first step is to determine the total gallons in the car. The total gallons in the car can be determined by dividing the total value of the gasoline the car by the cost per gallon. Division is the process of determining the quotient of two or more numbers.

Total gallons = total value of gasoline in the car / cost per gallon

$30 / $2.50 = 12 gallons

The next step is to determine the total miles that the car can travel using the gallons available. To determine the total miles, multiply the total gallons by the number of miles that that one gallon can cover.

Total miles = miles one gallon can cover x total gallons in the car

12 x 20 = 240 miles

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2 years ago

Find the number of integral solutions of x+y +z = 12, where −3 ≤ x ≤ 4, 2 ≤ y ≤ 11, and<br> z ≥ 3.

SashulF [63]

There are 59 integer solutions

Such questions are best solved by writing cases and calculating the total number of cases. So beginning with

1) x = -3. The possible combinations are as follows:-

-3 2 13

-3 3 12

-3 4 11

-3 5 10

-3 6 9

-3 7 8

-3 8 7

-3 9 6

-3 10 5

-3 11 4

10 combinations

2) x = -2

-2 2 12

through

-2 11 3

10 combinations

3) x = -1

-1 2 11

through

-1 10 3

9 combinations

4) x = 0

0 2 10

through

0 9 3

8 combinations

as we can see from the pattern at x =1 we get 7 combinations, at x =2 we get 6 combinations, at x=3 we get 5 combinations and at x =4 we get 5 combinations.

Thus total number of combinations 4+5+6+7+8+9+10+10 = 59 integer solution.

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2 years ago

Mario is setting up a new tent during a camping trip. The tent came with 7 feet of rope. The instructions are to use 34.5 inches

vampirchik [111]

An equation is formed of two equal expressions. The number of sections that Mario can cut from the rope is 6.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Let the number of 8 1/4 - inch sections of rope Mario can cut from the rope be x.

Since the total length of the rope is 7 feet, which is equal to 84 inches(1 foot=12 inches), the instructions are to use 34.5 inches of the rope to tie a tarp on top of the tent. Therefore, the rope for the 8 1/4 inches section is,

Rope left = 84 inches - 34.5 inches

Since the length of a single section is 8 1/4 inches(8.25 inches), therefore the number of sections that can be made from the remaining section is,

The number of sections, n = Rope left/8.25 inches

= (84 -34.5)inches /8.25 inches

= 6

Hence, the number of sections that Mario can cut from the rope is 6.

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7 0

2 years ago

PLEASE HELP DUE TODAY DO A AND B PARTS PLEASE PLEASE HELP ME FIGURE OUT THE LENGTH 100 POINTS

aksik [14]

Answer:

Length A: 5 ft

Width B: 4 ft

volume = 88 ft³

Step-by-step explanation:

Length A: 8 - 3 = 5 ft

Width B: 8 - 4 = 4 ft

<u>Volume</u>

The easiest way to calculate the volume is to split the trough into two rectangular prisms. (imagine drawing a horizontal line from the internal corner of A and 4ft to the left 8ft side).

Volume of a rectangular prism = width x length x height

Volume of rectangular prism 1: B x 8 x 2 = 4 x 8 x 2 = 64 ft³

Volume of rectangular prism 2: 3 x 4 x 2 = 24 ft³

Total volume = 64 + 24 = 88 ft³

6 0

2 years ago

Read 2 more answers

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7​

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7