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3 years ago

Please help 15 points and brainliest!

Mathematics

1 answer:

Umnica [9.8K]3 years ago

3 0

C because the proportions are equal and multiplied by 4/4

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Which techniques can be used to evaluate the expression 12.75/<br><br> 1.5

sergeinik [125]

Answer:

8.5

Step-by-step explanation:

Given the expression 12.75/1.5. The technique in solving the division expression is as shown

First we can write the decimals as fraction as shown;

12.75 = 1275/100

1.5 = 15/10

12.75/1.5 = (1275/100)÷(15/10)

12.75/1.5 = 1275/100×10/15

12.75/1.5 = 1275/10 × 1/15

12.75/1.5 = 1275/150

12.75/1.5 = 8.5

Hence the result of the division is 8.5

6 0

3 years ago

A student gets 9 out of 15 problems correct on a homework assignment.

Alex777 [14]

Answer:40%.

Since the student got 60% correct, the remaining percentage would be the part they got incorrect.

I got 60% by translating 9/15 into a decimal and moving the decimal point to create a percentage.

Hope this helps!

Step-by-step explanation:

7 0

3 years ago

0.7x+6=0.3(4x+6)−2x

Gelneren [198K]

Answer: $x=-2.8$

Step-by-step explanation:

Given the following equation:

$0.7x+6=0.3(4x+6)-2x$

You can follow these steps in order to solve for "x" and find its value:

1. Apply Distributive property on the right side of the equation:

$0.7x+6=0.3(4x+6)-2x\\\\0.7x+6=1.2x+1.8-2x$

2. Subract $0.7x$ from both sides and add the like terms:

$0.7x+6-(0.7x)=1.2x+1.8-2x-(0.7x)\\\\6=-1.5x+1.8$

3. Subtract 1.8 from both sides:

$6-(1.8)=-1.5x+1.8-(1.8)\\\\4.2=-1.5x$

4. Finally, divide both side of the equation by -1.5:

$\frac{4.2}{-1.5}=\frac{-1.5x}{-1.5}\\\\x=-2.8$

8 0

3 years ago

Read 2 more answers

The solution to an inequality is given in interval notation as (2, ∞). What is another way to represent this solution set? A num

Leya [2.2K]

The solution is in parenthesis, so this means the numbers are included in the answer. Since the first number is 2, 2 is a possible answer so the circle at positive two would be solid.

The other solution is infinity, so the answers are any number to the right of the 2 on the number line.

This makes the answer: A solid circle appears at positive 2. The number line is shaded between positive 2 and positive 5.

5 0

2 years ago

Read 2 more answers

The sum of two numbers is 75. The second number is<br> less than twice the first. Find the numbers.

Lera25 [3.4K]

Answer:

First number =26

Second number =49

Step-by-step explanation:

Question:

The sum of two numbers is 75. The second number is 3 less than twice the first. Find the numbers.

Given:

Sum of two numbers = 75

The second number is 3 less than twice the first.

To find the numbers.

Solution:

Let the first number be = $x$

Let second number be = $y$

The sum equation can be given as:

$x+y=75$

It is given that the second number is 3 less than twice the first.

This can be given as:

$y=2x-3$

Substituting the value of $y$ in terms of $x$ in the sum equation.

$x+(2x-3)=75$

Combining like terms.

$3x-3=75$

Adding 3 both sides.

$3x-3+3=75+3$

$3x=78$

Dividing both ides by 3.

$\frac{3x}{3}=\frac{78}{3}$

$x=26$

Substitution $x=26$ in the second equation to find $y$ .

$y=2(26)-3\\y=52-3\\\therefore y=49$

Thus, first number =26 and second number =49.

4 0

3 years ago