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4 years ago

What is the answer to 2[x+1]=3x-x+2?

1 answer:

5 0

2[x+1] = 3x -x + 2
Open parenthesis
2x + 2 = 2x + 2
Subtract both sides by 2x + 2
0 = 0
Since this is always true, there are infinitely many solutions.

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Walk 3 miles per hour to school, which is 1.5 miles how long will the trip take

Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

I think you have to divide key word per hour per means divide

6 0

3 years ago

Letty answered 15 out of 20 questions correctly on her history quiz. What

Furkat [3]

Answer:

75%

Step-by-step explanation:

One way to find this out is to divide 15 by 20

15/20 can be simplified into 0.75.

Another example:

Let's say a student does absolutely horrendus on the test, and gets only 4 questions correct out of 20. You can do 4/20 which is 0.2 in decimal form. (You can use a calculator.) This means that in this example, this student got a 20% on the test.

4 0

3 years ago

Determine the value of r so that the line through (5, 2) and (7, r) has a slope of m= -1/2

vodka [1.7K]

Y = mx + b
slope(m) = -1/2
(5,2)...x = 5 and y = 2
sub and find b
2 = -1/2(5) + b
2 = -5/2 + b
2 + 5/2 = b
4/2 + 5/2 = b
9/2 = b

so ur equation for this line is : y = -1/2x + 9/2

y = -1/2x + 9/2......(7,r)....when x = 7
y = -1/2(7) + 9/2
y = -7/2 + 9/2
y = 2/2
y = 1

so ur missing variable is 1......ur set of points would then be (7,1) <=

7 0

3 years ago

Please help ASAP!!!!

Karo-lina-s [1.5K]

The answer is 60.

4x + 12 + x + x =180

solve for x. solve for d. Now you can find angle c.

7 0

3 years ago

Solve for the missing sides 30-60-90 triangle show work please and thank you

Alex_Xolod [135]

Answer:

$x=8\sqrt{3}$

$y=16$

$x=3$

$y=3\sqrt{3}$

Step-by-step explanation:

The sides of a (30 - 60 - 90) triangle follow the following proportion,

$a-a\sqrt{3}-2a$

Where (a) is the side opposite the (30) degree angle, ( $a\sqrt{3}$ ) is the side opposite the (60) degree angle, and (2a) is the side opposite the (90) degree angle. Apply this property for the sides to solve the two given problems,

It is given that the side opposite the (30) degree angle has a measure of (8) units. One is asked to find the measure of the other two sides.

The measure of the side opposite the (60) degree side is equal to the measure of the side opposite the (30) degree angle times ( $\sqrt{3}$ ). Thus the following statement can be made,

$x=8\sqrt{3}$

The measure of the side opposite the (90) degree angle is equal to twice the measure of the side opposite the (30) degree angle. Therefore, one can say the following,

$y=16$

In this situation, the side opposite the (90) degree angle has a measure of (6) units. The problem asks one to find the measure of the other two sides,

The measure of the side opposite the (60) degree angle in a (30-60-90) triangle is half the hypotenuse times the square root of (3). Therefore one can state the following,

$y=3\sqrt{3}$

The measure of the side opposite the (30) degree angle is half the hypotenuse (the side opposite the (90) degree angle). Hence, the following conclusion can be made,

$x=3$

6 0

3 years ago