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Ne4ueva [31]
3 years ago
6

Find each sum 1. 56 + (-56) 2. -240 + 370 3. -5.7 + (-4.2)

Mathematics
2 answers:
Zinaida [17]3 years ago
4 0

Answer:

1. 0

2. 130

3. − 9.9

sorry if am wrong

Zolol [24]3 years ago
3 0

Answer:

1. 56 + (-56) = 56 - 56 = 0

2. -240 + 370 = 370-240 = 130

3. -5.7 + (-4.2) = -(5.7+4.2) = -9.9

Let me know if this helps!

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If in a triangle ac= 15 and angle abc=60 degrees what is ab?
marin [14]

Answer:

∠A=30° and AC and BC is 13 and 7.5 units respectively

Step-by-step explanation:

Given that in a right triangle ABC , right angled at C , if angle B =60 degree and AB =15 units

we have to find the remaining angles.

By angle sum property,  sum of angles in right angle is 180°

∠A+∠B+∠C=180°

∠A+ 60°+90°=180

∠A=180°-150°=30°

∠A=30°

As AB= 15

Now by trigonometric ratios we find the other sides of triangle ABC

Hence, ∠A=30° and AC and BC is 13 and 7.5 unitsStep-by-step explanation:

∠A=30° and AC and BC is 13 and 7.5 units respectively

Step-by-step explanation:

Given that in a right triangle ABC , right angled at C , if angle B =60 degree and AB =15 units

we have to find the remaining angles.

By angle sum property,  sum of angles in right angle is 180°

∠A+∠B+∠C=180°

∠A+ 60°+90°=180

∠A=180°-150°=30°

∠A=30°

As AB= 15

Now by trigonometric ratios we find the other sides of triangle ABC

Hence, ∠A=30° and AC and BC is 13 and 7.5 units

3 0
3 years ago
Posting algebra again :/
ioda
It is B
Have a good day
5 0
2 years ago
PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS!<br> Are the images convex or concave polygons?
svp [43]

Answer:

concave polygones

Step-by-step explanation:

5 0
2 years ago
Is this linear relationship a direct variation?
Talja [164]

Since the ratio of of second variable to the ratio of first variable remains constant i.e y/x =8 so, the linear relationship is direct variation.

Step-by-step explanation:

A relationship is said to have direct variation if ratio of second variable to the ratio of first variable remains constant.

A relationship is direct variation if y=kx\,\,or\,\, \frac{y}{x} =k where k is the constant.

Now checking if the given data is having direct variation or not.

x       y

3       24

4       32

5       40

6       48

Now finding y/x

if y=24 and x = 3 then y/x = 24/3 = 8

if y=32 and x = 4 then y/x =32/4=8

if y=40 and x = 5 then y/x =40/5 =8

if y=48 and x = 6 then y/x =48/6= 8

Since the ratio of of second variable to the ratio of first variable remains constant i.e y/x =8 so, the linear relationship is direct variation.

Keywords: Direct Variation

Learn more about Direct Variation at:

  • brainly.com/question/10708697
  • brainly.com/question/2495851
  • brainly.com/question/5069437

#learnwithBrainly

5 0
3 years ago
The height of a soccer ball that is kicked from the ground can
AveGali [126]

Answer:

87.5

Step-by-step explanation:

By completing the square,

y

=-14x^2+70x

=-14(x^2-5x)

=-14(x-5/2)^2+175/2

the max. height=175/2

i.e. 87.5

8 0
3 years ago
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