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3 years ago

PLEASE HELP now I really need to know

Mathematics

2 answers:

Leona [35]3 years ago

6 0

Answer:

Step-by-step explanation:

-2.5 + 5n - 1.5n

-2.5 + 3.5n

Option B is the correct answer

Anna11 [10]3 years ago

3 0

Answer:

Step-by-step explanation:

so first you got to solve the expression so -2.5(-1-2n)-1.5

−2.5(1−2n)−1.5n

Use the distributive property to multiply −2.5 by 1−2n.

−2.5+5n−1.5n

Combine 5n and −1.5n to get 3.5n.

your answer is −2.5+3.5n

if this is wrong then probably

solve the other expressions to see if u get the same answer

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Round 25,000 to the nearest ten thousand

Ede4ka [16]

Answer: 30,000

Step-by-step explanation:

Round 5 up to 10 25000 to 30000

6 0

3 years ago

Read 2 more answers

For a trip, one high school rented and filled 8 vans and 5 buses with 196 students.

bixtya [17]

Each van can carry 12 students while each bus can carry 20 students each.

Step-by-step explanation:

Step 1; Assume x is the number of students in a van and y is the number of students in a bus. It is given that 8 vans and 5 buses are filled with 196 students in one high school. So

8x + 5y = 196, take this as equation 1.

In another high school, 216 students are fitted into 3 vans and 9 buses. So,

3x + 9y = 216, take this as equation 2.

Step 2; We multiply equation 1 with 3 and equation 2 with 8 so we can cancel out the variable x in both equations. By doing this we get

24x + 15y = 588, take this as equation 3 ,

24x + 72y = 1,728, take this is equation 4,

If we subtract equation 4 from equation `3, we cancel out the x variable and can calculate the value of y.

-57y = -1,140,

Since both sides are negative they cancel out

y = -1,140/-57 = 20.

Step 3; Substituting this value of y in any of the previous equations we will get x's value. Here this value of y is substituted in equation 1.

8x +5(20) = 196, 8x + 100 = 196 , 8x = 96, x= 12.

So we have x = 12 and y = 20.

So 12 students can fit in a van and each bus can carry 20 students.

3 0

3 years ago

Help, im not really understanding this

Mice21 [21]

Steps:

1-29f^2/d^4/2f^2= 58f^2/d^4

All i did in step one was simplify D variables then multiplied 29f^2 and 2f^2 together to get 58f^2

d5/58f^4

Answer is A

5 0

3 years ago

If the endpoints of segment AB are A(-4,5) and B(2,-5), please help!

nadezda [96]

Answer:

$d = \sqrt[2]{34}$

Step-by-step explanation:

We are solving for the segment of AB. Note that it is a line segment, so there will be end points, those being A(-4, 5) & B(2, -5).

Use the following distance formula:

$distance$ $(d) =$ $\sqrt{(x_{2} - x_{1})^{2} + (y_{2} - x_{2})^2 }$

Let:

Point B(2 , -5) = (x₁ , y₁)

Point A(-4 , 5) = (x₂ , y₂)

Plug in the corresponding numbers to the corresponding variables.

$d =$ $\sqrt{(-4 - 2)^{2} + (5 - (-5))^{2} }$

Simplify. Remember to follow PEMDAS. First, solve the parenthesis, then the powers, then add, and then finally square root.

$d = \sqrt{(-6)^{2} + (5 + 5)^{2} } \\d = \sqrt{(-6 * -6) + (10)^2} \\d = \sqrt{(36) + (10 * 10)} \\d = \sqrt{36 + (100)} \\d = \sqrt{136}$

Simplify:

$d = \sqrt{136} = \sqrt{2 * 2 * 2 * 17} = \sqrt[2]{17 * 2} = \sqrt[2]{34}$

$d = \sqrt[2]{34}$ is your answer.

3 0

4 years ago

What is the midpoint of CD? • (1/2,-5/2) •(1,-5/2) •(1/2,-3/2) •(1,-3/2)

polet [3.4K]

Answer:

(1/2,-5/2)

Step-by-step explanation:

$\frac{ - 3 + 4 }{2} = \frac{1}{2} \\ \frac{ - 4 + - 1}{2} = \frac{ - 5}{2}$

7 0

3 years ago

Read 2 more answers

PLEASE HELP now I really need to know​

PLEASE HELP now I really need to know