1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
strojnjashka [21]
3 years ago
9

Please help me I am so lost!

Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
8 0
1. Plug in -3 for a
14-(-3)^2
14-9
5

Final answer: 5

2. 15 more than r=15+r (notice the keyword more) equals 61
Final answer: r+15=61
uranmaximum [27]3 years ago
8 0
14 - a^2
= 14 - (-3)^2
= 14 - 9
= 5

answer D. 5

--------
15 + r = 61 or r + 15 = 61

answer is B.
You might be interested in
1. Consider the right triangle ABC given below.
lbvjy [14]
#1) 
A) b = 10.57
B) a = 22.66; the different methods are shown below.
#2)
A) Let a = the side opposite the 15° angle; a = 1.35.
Let B = the angle opposite the side marked 4; m∠B = 50.07°.
Let C = the angle opposite the side marked 3; m∠C = 114.93°.
B) b = 10.77
m∠A = 83°
a = 15.11

Explanation
#1)
A) We know that the sine ratio is opposite/hypotenuse.  The side opposite the 25° angle is b, and the hypotenuse is 25:
sin 25 = b/25

Multiply both sides by 25:
25*sin 25 = (b/25)*25
25*sin 25 = b
10.57 = b

B) The first way we can find a is using the Pythagorean theorem.  In Part A above, we found the length of b, the other leg of the triangle, and we know the measure of the hypotenuse:
a²+(10.57)² = 25²
a²+111.7249 = 625

Subtract 111.7249 from both sides:
a²+111.7249 - 111.7249 = 625 - 111.7249
a² = 513.2751

Take the square root of both sides:
√a² = √513.2751
a = 22.66

The second way is using the cosine ratio, adjacent/hypotenuse.  Side a is adjacent to the 25° angle, and the hypotenuse is 25:
cos 25 = a/25

Multiply both sides by 25:
25*cos 25 = (a/25)*25
25*cos 25 = a
22.66 = a

The third way is using the other angle.  First, find the measure of angle A by subtracting the other two angles from 180:
m∠A = 180-(90+25) = 180-115 = 65°

Side a is opposite ∠A; opposite/hypotenuse is the sine ratio:
a/25 = sin 65

Multiply both sides by 25:
(a/25)*25 = 25*sin 65
a = 25*sin 65
a = 22.66

#2)
A) Let side a be the one across from the 15° angle.  This would make the 15° angle ∠A.  We will define b as the side marked 4 and c as the side marked 3.  We will use the law of cosines:
a² = b²+c²-2bc cos A
a² = 4²+3²-2(4)(3)cos 15
a² = 16+9-24cos 15
a² = 25-24cos 15
a² = 1.82

Take the square root of both sides:
√a² = √1.82
a = 1.35

Use the law of sines to find m∠B:
sin A/a = sin B/b
sin 15/1.35 = sin B/4

Cross multiply:
4*sin 15 = 1.35*sin B

Divide both sides by 1.35:
(4*sin 15)/1.35 = (1.35*sin B)/1.35
(4*sin 15)/1.35 = sin B

Take the inverse sine of both sides:
sin⁻¹((4*sin 15)/1.35) = sin⁻¹(sin B)
50.07 = B

Subtract both known angles from 180 to find m∠C:
180-(15+50.07) = 180-65.07 = 114.93°

B)  Use the law of sines to find side b:
sin C/c = sin B/b
sin 52/12 = sin 45/b

Cross multiply:
b*sin 52 = 12*sin 45

Divide both sides by sin 52:
(b*sin 52)/(sin 52) = (12*sin 45)/(sin 52)
b = 10.77

Find m∠A by subtracting both known angles from 180:
180-(52+45) = 180-97 = 83°

Use the law of sines to find side a:
sin C/c = sin A/a
sin 52/12 = sin 83/a

Cross multiply:
a*sin 52 = 12*sin 83

Divide both sides by sin 52:
(a*sin 52)/(sin 52) = (12*sin 83)/(sin 52)
a = 15.11
3 0
3 years ago
Read 2 more answers
PLSSSS HELP >>>>>Solve the following inequality. Write your answer with no spaces in the inequalities and separat
Fofino [41]

Answer:

1x<5 or 0>0

Step-by-step explanation:

7 0
3 years ago
Write an inequality to describe the possible values of x.
Papessa [141]

Answer:

d

Step-by-step explanation:

x<9+7, and x+7>9

solve

x<16

x>2

2<x<16

6 0
3 years ago
If you could help that would be awesome.
Nadusha1986 [10]

Answer:

2:1

Step-by-step explanation:

4 pencils : 2 pens

simplify...

2 pencils : 1 pen

2:1

Hope this is helpful.

6 0
3 years ago
Write the numerical expression to represent the following phrase: Three piles of eight pennies each, with two left over. Calcula
mr_godi [17]
Your answer woild be 3×8+2 and if solved equals 26
7 0
3 years ago
Other questions:
  • The H.C.F. and L.C.M. of two numbers are 6 and 280 respectively if one of the number is 30 find the other number.
    13·1 answer
  • Mr. Skinner has four dogs. He recorded the number of cups of dog food each dog ate over the same month.
    15·1 answer
  • Please help. question in the photo!
    6·1 answer
  • Name the properties of a rectangle
    7·1 answer
  • A camera is capable of snapping (3/4) of a picture per. how long will take the camera to snap 6 picture
    9·2 answers
  • Guys I really need help on this please
    9·1 answer
  • What percent's falls between 0.5 and 0.6
    15·1 answer
  • PLZ ANSWER ASAP!
    14·1 answer
  • How many days in 4 years?<br><br> Answer: 1461
    8·2 answers
  • Write the next three terms of the arithmetic sequence.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!