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Afina-wow [57]
3 years ago
15

HELP PLEASE ANSWER ALL

Mathematics
2 answers:
Brilliant_brown [7]3 years ago
5 0
-12*-2 +2*-1 = 22
10+ (-4)-(-6) = 12
-8(-7-3) = 80
3-9+2(-9+4) = -16
12-{15+(-3)} / 6-8 = -9
15- 5{-(-5)} = 15
weqwewe [10]3 years ago
3 0

Answer:

1) 22

2)12

3)-80

4)-16

5)-10.5

6)-10

Step-by-step explanation:

-12x + 2y when x = -2 and y = -1

= -12 (-2) + 2 (-1)

= 24 + (-2)

= 22

10 + a - b when a = -4 and b = -6

= 10 + (-4) - (-6)

= 10 - 4 + 6

= 10 + 2

= 12

8(n-3) when n = -7

= 8 (- 7 - 3)

= - 56 - 24

= - 80

3 - x + 2(-x + 4) when x = 9

= 3 - 9 + 2 (- 9 + 4)

= - 6 - 18 + 8

= - 24 + 8

= - 16

12 - (15 + y) / 6 - 8 when y = -3

= 12 - 15 + 3 / 6 - 8

= 12 - 15 + 0.5 - 8

= - 3 - 7.5

= - 10.5

15 - a(-b) when a = 5 and b = -5

= 15 - 5 (5)

= 15 - 25

= - 10

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a kid sits on top of a 12 foot slide, looking down with an angle of depression of 25 degrees. find the height of the slide
Nikolay [14]

Answer:

Height of slide = 5 feet (Approx.)

Step-by-step explanation:

Given:

Length of slide = 12 feet

Angle of depression = 25°

Find:

Height of slide

Computation:

Length of slide = Hypotenuse

Height of slide = Perpendicular

Using trigonometry function;

Sin θ = Perpendicular / Hypotenuse

Sin 25 = Height of slide / 12

0.422 = Height of slide / 12

Height of slide = 12 x 0.422

Height of slide = 5.064

Height of slide = 5 feet (Approx.)

5 0
3 years ago
If p(a) = 0.50, p(b) = 0.60, and p(a intersection
bogdanovich [222]
Use the identity P(A ∪ B) = P(A)+P(B)-P(A ∩ B)

P(A)=0.50
P(B)=0.60
P(A ∪ B) = 0.30
=>
P(A ∪ B) = P(A)+P(B)-P(A ∩ B)
=(0.50+0.60)-0.30
=0.80
5 0
3 years ago
John travels 39 miles moving 26 miles per hour.How long will it take for his trip? HELPP!!!!
loris [4]
t=\frac{d}{v}
t - time, d - distance, v - speed

d=39 \ mi \\
v=26 \ \frac{mi}{h} \\ \\
t=\frac{39}{26}=\frac{3 \times 13}{2 \times 13}=\frac{3}{2}=1.5 \ [h]

It will take 1.5 h.
7 0
3 years ago
Can some one plz help me?! The LATERAL Surface Area for the shape below is:
love history [14]

Answer:

430 cm2

Step-by-step explanation:

The Lateral Surface Area of it is equal to:

Area of ABCD + Area of A'B'C'D' + Area of ABB'A' + Area of DCC'D' + Area of ADD'A' + Area of BCC'B'

As ABCDA'B'C'D' is a rectangle prism, so that:

+) Area of ABCD = Area of A'B'C'D'

+) Area of ABB'A' = Area of DCC'D'

+) Area of ADD'A' = Area of BCC'B'

=> Total lateral surface area = 2. Area ABCD + 2. Area ABB'A + 2. Area ADD'A

As ABCDA'B'C'D' is a rectangle prism, so that we have: ABCD, ABB'A', ADD'A' are rectangles.

The formula to calculate the area of rectangle is: Area = Length x Width

We have:

+) Area ABCD = AB x BC =11 x 10 = 110 cm2

+) Area ABB'A = AB x AA' = 11 x 5 = 55 cm2

+) Area ADD'A = AA' x A'D' = 5 x 10 = 50cm2

Total lateral surface area = 2. Area ABCD + 2. Area ABB'A + 2. Area ADD'A

= 2 x 110 + 2 x 55 + 2 x 50 = 430 cm2

4 0
3 years ago
Carlos has 2 dollars more than half of the total amount of money his brother has. If x represents the amount of money Carlos’s b
Neko [114]

Answer:

xX2/2?

Step-by-step explanation:

3 0
3 years ago
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