All categories

2 years ago

Add or subtract.

Mathematics

1 answer:

artcher [175]2 years ago

3 0

ANSWER:

[1] 8y + 13 + (3y - 11)

8y + 13 + 3y - 11
11y + 2.

[2] - 2n - 15 + (- 5n + 6)

- 2n - 15 - 5n + 5
- 7n - 10.

[3] - 11x + 5 - (4x - 4)

- 11x + 5 - 4x + 4
- 15x + 9.

You might be interested in

Are they simular and why

S_A_V [24]

Answer:

YES

Step-by-step explanation:

because there the same shape but the right one is moved to the side a little bit

4 0

2 years ago

Calculate<br>a) 20% of £150<br>b) 15% of 80 kg<br>c) 85% of 2500 m

kotykmax [81]

Answer:

A) 30

B) 12 kg

C) 2,125 m

Step-by-step explanation:

8 0

2 years ago

- Let y represent the width of a rectangle and let x represent the rectangle's lengu.

valentina_108 [34]

Answer:

Length: 21 cm and Width: 6cm

Step-by-step explanation:

Let $y$ be the width and $x$ length of the rectangle. We know:

$x = 4y -3$ -------- eq. 1

$54 = 2x + 2y$ (Perimeter of the rectangle) ------- eq. 2

Substitute equation 1 in equation 2:

$54 = 2(4y-3) + 2y\\54 = 8y - 6 + 2y\\54 + 6 = 8y + 2y\\60 = 10 y\\\\\frac{60}{10}= y\\y = 6$

Using the value of y, we find x.

$x = 4y - 3\\x = 4(6) -3\\x= 24 - 3\\x = 21$

4 0

3 years ago

I need help on number 9

lisov135 [29]

Complement angles, sum is equal 90

Give one angle = 70 to find other: 90 - 70 = 20

Answer

Complement of angle with the measure of 70 degrees is 20 degrees

3 0

3 years ago

How to work out an angle using cosine. three sides are; 8,19,12.

Kay [80]

To solve for cos use
adjacent over hypotenuse
divide the lengths of the sides
adj. / hyp.

7 0

2 years ago