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3 years ago

-9(-7) plz help very confusled

Mathematics

1 answer:

aleksley [76]3 years ago

3 0

Answer:

So, negatives cancel each other out.

Step-by-step explanation:

The answer is 63.

A negative times a negative gives you a positive.

-9 x -7 brings you = 63.

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Solve the system.

svetoff [14.1K]

Answer:

(0, 1)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

y + 5x = 1

5y - x = 5

Step 2: Rewrite Systems

y + 5x = 1

Subtract 5x on both sides: y = 1 - 5x

Step 3: Redefine Systems

y = 1 - 5x

5y - x = 5

Step 4: Solve for x

Substitution

Substitution in y: 5(1 - 5x) - x = 5
Distribute 5: 5 - 25x - x = 5
Combine like terms: 5 - 26x = 5
Isolate x term: -26x = 0
Isolate x: x = 0

Step 5: Solve for y

Define equation: 5y - x = 5
Substitute in x: 5y - 0 = 5
Subtract: 5y = 5
Isolate y: y = 1

8 0

2 years ago

The distance from Paula's house to school is 5 miles. There is a set of railroad tracks one-fourth of the distance away from her

Marina CMI [18]

5/4 = 1.25 miles which is the answer

6 0

3 years ago

Read 2 more answers

Learning Task 1: Read and analyze each problem carefully. Write your final answer in your notebook based on the given questions

solmaris [256]

Solving the given problems using the appropriate arithmetic operation such as multiplication, divison and addition, the answers are :

4 people
1000 ml
$1960

Total size of pizza = $2 \frac{2}{3} = \frac{8}{3}$

Number of pizzas gotten by each person = $\frac{2}{3$

Number of people sharing pizza :

$\frac{8}{3} \div \frac{2}{3} = \frac{8}{3} \times \frac{3}{2} = 4 \: people$

2.)

Volume bottle = 600 ml

Fraction of water = $\frac{3}{5}$

Volume of full bottle = $\frac{3}{5} \times n = 600 = \frac{3n}{5} = 600$

Volume of full bottle = $\frac{3n}{3000}$

Volume of full bottle = $n = \frac{3000}{3} = 1000 ml$

3.)

Amount left = Php. 980
Fraction spent = $\frac{4}{8}$

Let the monthly salary = m

Fraction left = $1 - \frac{4}{8} = \frac{4}{8} = \frac{1}{2}$

Hence,

$\frac{1}{2} \times m = 980$

$\frac{m}{2} = 980$

$m = 980 \times 2 = 1960$

Therefore, Joel's monthly salary is $1960

Learn more :brainly.com/question/18796573

8 0

2 years ago

Read 2 more answers

Substitute -3x-8y=4 -2x+7y=15

Nikolay [14]

-2x=15-7y
x=-7.5+3.5y

-3x-8y=4
-3(7.5+3.5y)-8y=4
-22.5-10.5y-8y=4
-22.5-18.5y=4
-18.5y=4+22.5
-18.5y=26.5
y=-53/35

the fraction might not be in lowest terms.

3 0

2 years ago

What is the sum of the geometric sequence 3,12,48... if there are 8 terms?

s344n2d4d5 [400]

Answer:

C) 65,535

Step-by-step explanation:

You can add up the 8 terms ...

3, 12, 48, 192, 768, 3072, 12288, 49152

to find their sum is 65535.

_____

Estimating

Knowing the last term (49152) allows you to make the correct choice, since the sum will be more than that and less than double that.

_____

Using the formula

You know the formula for the sum of a geometric sequence is ...

S = a1(r^n -1)/(r -1)

where a1 is the first term (3), r is the common ratio (4), and n is the number of terms (8).

Filling in the values, you find the sum is ...

S = 3(4^8 -1)/(4-1) = 4^8 -1 = 65535

6 0

3 years ago