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4 years ago

What statement about solving inequalities is true

Mathematics

1 answer:

STALIN [3.7K]4 years ago

8 0

Which statement about solving inequalities is true?

Solving Inequalities Involving Multiplication

Let's start with the true statement:10 > 5

Next, multiply both sides by the same positive number:

10 • 2 > 5 • 2

20 is greater than 10, so you still have a true inequality:

20 > 10

When you multiply by a positive number, leave the inequality sign as it is!

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In TriangleARC, m AngleA = 70°. What is the measure of arc AC?

rusak2 [61]

I found the image that should have accompanied this problem.

The triangle inside the circle is an isosceles triangle. It has 2 equal sides and 2 equal angles.

Angle A = 70° , Angle C is also 70°. This leaves angle R having 40°.

The arc opposite angle R is twice the measure of its angle.

Angle R = 40°
Arc AC = 40° x 2 = 80°

The measure of arc AC is 80°.

4 0

3 years ago

No files please! thanks

BigorU [14]

Answer:

y = $-\frac{1}{3}$

$2\frac{2}{3}=x$

Step-by-step explanation:

To solve a system of equations, solve one or both of the equations for the same variable. Then multiply one of the equations such that the coefficients of one variable are the additive inverse of the variable in the other equation. After doing so, add the two equations, then solve for the other variable using inverse operations. Finally, substitute the value of the other variable into one of the original equations in the system and solve for the unknown variable.

2x + y = 3

y = x - 2

First, manipulate the first equation such that the equation is solved for (y), this can be done using inverse operations,

y = 3 - 2x

y = x - 2

Now multiply the second equation by (2) so that the (x) coefficients are additive inverses of each other,

y = 3 - 2x

2y = 2x - 4

Add the equations,

3y = -1

Inverse operations,

3y = -1

/3 /3

y = $-\frac{1}{3}$

Now back solve, substitute the value of (y) into the equation and solve for (x),

$y=x-3\\$

Substitute,

$(-\frac{1}{3})=x-3$

$2\frac{2}{3}=x$

5 0

3 years ago

d) What would be the total cost of purchasing the number of shirts needed to use your coupon—after your coupon is applied and a

Yanka [14]

Answer: Multiply 7.5% by the price after subtracting the coupon's value.

Step-by-step explanation:

Let's assume that the cost of the shirts is x. So the coupon would subtract y from x so that's x-y which gives us z. Then to find z, on a calculator just put in 7.5% x z. I used variables since I don't know the value of the coupon or the original price of the shirts.

5 0

3 years ago

Can someone help me with all off theses plsss

Usimov [2.4K]

Answer:

3% = 0.03

30% = 0.3

25% = 0.25

80% = 0.8

8% = 0.08

12% = 0.12

67% = 0.67

17.5% = 0.175

8 0

3 years ago

Read 2 more answers

What is 25%(percent) Of 42

andrezito [222]

25% of 42=25 divided by 100 x 42
25\100 x 42=10.5

3 0

4 years ago

Read 2 more answers