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3 years ago

What is 15- (-14)??? Plz Explain

Mathematics

2 answers:

maxonik [38]3 years ago

7 0

Answer:

Step-by-step explanation:

-(-14) is a double negative, thus the minus signs are cancelled out turning 14 positive.

The equation is now 15 + 14 which is 29

vodka [1.7K]3 years ago

4 0

210

since when you multiply two negative numbers for example -15 times a negative 14 your answer will be positive then you do 15 times 14 which gives you positive 210.

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Please help me again lol

Vesna [10]

Answer:

114 degrees

Step-by-step explanation:

a line equals 180 degrees, so you subtract 66 from 180

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3 years ago

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Kaitlin needs 254 programs for the school play on Thursday. How many boxes of programs will she need, given that each box contai

Andrei [34K]

Answer:

8 382 ?

Step-by-step explanation:

254 × 33 = 8 382

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3 years ago

This net can be folded to make a square pyramid. what is the surface area of the pyramid

givi [52]

Answer:

$85in^2$

Step-by-step explanation:

to find the surface area we need to find the followng areas:

area of the square

area of a triangle and multiply it by 4 (because there are 4 triangles)

And once we have those areas, we add them to find the surface area.

Area of the square:

the formula to find the area of a square is:

$a_{square}=l^2$

where $l$ is the length of the side: $l=5in$

thus the area of the square is:

$a_{square}=(5in)^2$

$a_{square}=25in^2$

Area of the triangles:

the are of 1 triangle is given by

$a_{triangle} =\frac{b*h}{2}$

where $b$ is the base of the triangle: $b=5in$ (the base of the triangle is the side of the square)

and $h$ is the height of the triangle: $h=6in$

thus, the area of 1 triangle is:

$a_{triangle} =\frac{(5in)*(6in)}{2}$

$a_{triangle} =\frac{30in^2}{2}$

$a_{triangle} =15in^2$

the area of the 4 triangles is (we multiply by 4):

$a_{4-triangles}=4(15in^2)$

$a_{4-triangles}=60in^2$

finally we add the area of the square and the area of the 4 triangles to find the total surface area:

$Surface=25in^2+60in^2$

$Surface=85in^2$

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2 years ago

X^2− 14 + 45 = 0<br> Solve with quatratics formula

bulgar [2K]

Step-by-step explanation:

-b√b²-4(ac)

14√(-14)²-4·(1·45)

2·1

x=7∉ 2

x=9,5

6 0

3 years ago

What is 0.4 of 10? It’s percents

marusya05 [52]

Answer:

Step-by-step explanation:

3 0

2 years ago