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3 years ago

7th grade math help me please :)

Mathematics

2 answers:

adell [148]3 years ago

8 0

Answer:8 x+ 10 y can not be simplified .

Step-by-step explanation:

Explanation:This is because the term are not the same.8x has the term x while 10 y has the term y.

GarryVolchara [31]3 years ago

4 0

Answer:

8x+10y cannot be simlified because they do not have a common variable

so until you find the value for x and y u cannot simplify

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Travka [436]

$\\ \sf\longmapsto \sqrt{512x^3}=\sqrt{2\times 2\times 2\times 2\times 2\times 2\times 2\times 2x^2x}=16x$
$\\ \sf\longmapsto x-8=-5\implies x=3$
$\\ \sf\longmapsto \sqrt{x-8}=\sqrt{-x+2}\implies x-8=-x+2\implies 2x=10\implies x=5$

6 0

3 years ago

Express the fraction in simplest form.

blagie [28]

4/16 in simplest form:

First, we need to find the greatest common factor (GCF) of 4 and 16. Why? We have to find the number that we are going to be dividing the numerator and denominator by to get the simplest form of the fraction. Let's list the factors for 4 and 16:

Factors of 4: 1, 2, 4
Factors of 16: 1, 2, 4, 8, 16

Out of the two sets of factors, which ones are the common ones? The common factors between the two are 1, 2, and 4. Since we are looking for the GREATEST common factor, we have to look at the highest number out of 1, 2, and 4. The GCF is 4, since 4 is higher than 1 and 2.

Second, we now have a number that we are going to divide the numerator and denominator by, which is 4. The numerator is the top number of the fraction (4) and the denominator is the bottom number of the fraction (16).Let's divide now.

$4 \div 4 = 1 \\ 16 \div 4 = 4$

Third, we now have the simplified fraction. (1) is our new numerator, and (4) is our new denominator. This makes the new simplified fraction 1/4. So, your answer is C.

Answer in fraction form: $\fbox {1/4}$
Answer in decimal form: $\fbox {0.25}$

4 0

3 years ago

Read 2 more answers

A group of rectangular prisms is shown.

scoray [572]

Answer:

D, E and F

calculating the volume of regular bodies like prims works by multiplication alone.

you need some addition for surface area and for more complicated bodies that when the volume can't be calculated in one step

8 0

3 years ago

What is the point-slope equation of a line if the slope is 3 and it passes through the point (-9, 2

Art [367]

Answer:

The point-slope equation of the line is y - 2 = 3(x + 9)

Step-by-step explanation:

The form of the point-slope equation is y - y1 = m(x - x1), where

m is the slope of the line

(x1, y1) is a point on the line

∵ The slope of a line is 3

∴ m = 3

∵ The line passes through point (-9, 2)

∵ x1 = -9

∴ y1 = 2

→ Substitute the values of m, x1, and y1 in the point-slope form

∵ y - y1 = m(x - x1)

∴ y - 2 = 3(x - (-9))

→ Remember (-)(-) = (+)

∴ y - 2 = 3(x + 9)

∴ The point-slope equation of the line is y - 2 = 3(x + 9)

6 0

3 years ago

Solve for x. x = [?] = 5x - 73x + 27 Enter

alexandr402 [8]

When we use the equals sign (=), we indicate that two expressions are equal in value. This is called an equation. For example, is an equation. By choosing certain procedures, you can go step by step from a given equation to the equation = some number. The number is the solution to the equation.

One of the first procedures used in solving equations has an application in our everyday world. Suppose that we place a -kilogram box on one side of a seesaw and a -kilogram stone on the other side. If the center of the box is the same distance from the balance point as the center of the stone, we would expect the seesaw to balance. The box and the stone do not look the same, but they have the same value in weight. If we add a -kilogram lead weight to the center of weight of each object at the same time, the seesaw should still balance. The results are equal.

There is a similar principle in mathematics. We can state it in words like this.

The Addition Principle

If the same number is added to both sides of an equation, the results on each side are equal in value.

We can restate it in symbols this way.

For real numbers a, b, c if a=b thenat+tc=b+ec

Here is an example.

, then

Since we added the same amount to both sides, each side has an equal value.

We can use the addition principle to solve an equation.

EXAMPLE 1 Solve for .

Use the addition principle to add to both sides.

Simplify.

The value of is .

We have just found the solution of the equation. The solution is a value for the variable that makes the equation true. We then say that the value, , in our example, satisfies the equation. We can easily verify that is a solution by substituting this value in the original equation. This step is called checking the solution.

Check. =

≟

= ✔

When the same value appears on both sides of the equals sign, we call the equation an identity. Because the two sides of the equation in our check have the same value, we know that the original equation has been correctly solved. We have found the solution.

When you are trying to solve these types of equations, you notice that you must add a particular number to both sides of the equation. What is the number to choose? Look at the number that is on the same side of the equation with , that is, the number added to . Then think of the number that is opposite in sign. This is called the additive inverse of the number. The additive inverse of is . The additive inverse of is . The number to add to both sides of the equation is precisely this additive inverse.

It does not matter which side of the equation contains the variable. The term may be on the right or left. In the next example the x term will be on the right.

EXAMPLE 2 Solve for .

Add to both sides, since is the additive inverse of . This will eliminate the on the right and isolate .

Simplify.

The value of is .

Check. =

≟ Replace by .

= ✔ Simplify. It checks. The solution is .

Before you add a number to both sides, you should always simplify the equation. The following example shows how combining numbers by addition separately, on both sides of the equation—simplifies the equation.

EXAMPLE 3 Solve for .

Simplify by adding.

Add the value to both sides, since is the additive inverse of .

Simplify. The value of is .

Check. =

≟ Replace by in the original equation.

✔ It checks.

In Example 3 we added to each side. You could subtract from each side and get the same result. In earlier lesson we discussed how subtracting a is the same as adding a negative . Do you see why?

We can determine if a value is the solution to an equation by following the same steps used to check an answer. Substitute the value to be tested for the variable in the original equation. We will obtain an identity if the value is the solution.

EXAMPLE 4 Is the solution to the equation ? If it is not, find the solution.

We substitute for in the equation and see if we obtain an i

4 0

2 years ago