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3 years ago

If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a= -3 3 1/5

Mathematics

1 answer:

goblinko [34]3 years ago

8 0

(a,7) => x=a, y=7

5x-y=8
5a-7=8
5a=15
a=3

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Solve the following factorize and the en- equation of quadrate equation X² + 5x + 7 x = 0

nlexa [21]

Answer:

{-12,0}

Step-by-step explanation:

first to solve this can collect like terms and add

X² +12x=0

and solve it by factorization method

X² +12x=0

x(x+12)=0

it means x multiplied by x = X² then x multiplied by 12 = 12x

so this means x or (x+12) equals to zero

x=0 and (x+12)=0

x+12=0

x=-12

so the solution set is {-12,0}

but can also be done by formula method

8 0

2 years ago

Two angles in a triangle have measures of 42 and 82 what is the measure of the third angle

skelet666 [1.2K]

Answer:

angles of the triangle are equal 180

so 42+82=124

180-124=56

so the answer is 56

Step-by-step explanation:

4 0

3 years ago

Is y=7x+2 x+7y=8 parallel, perpendicular, or neither?

Murljashka [212]

Rearrange them to slope-intercept form

y = 7x + 2

y = -(1/7) x + 8

product of their slopes is 7 * -1/7 = -1 so they are perpendicular

3 0

3 years ago

Find the length of side AB.<br>Give your answer to 1 decimal place.

Luden [163]

Answer:

The answer is below

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, scalene, equilateral, acute, obtuse and right angled triangle. A right angle triangle is a triangle with one angle being 90°.

Trigonometric ratios is used to show the relationship between the angles and sides of a right angled triangle. Examples are:

sinΘ = opposite/hypotenuse; cosΘ = adjacent/hypotenuse; tanΘ = opposite/adjacent

From the question:

cos(62) = AB/12

AB = 12 * cos(62)

AB = 5.6 cm

4 0

3 years ago

Ashley flies a drone 2,530 ft in 5 s. At this rate how many miles does the drone fly in a minute? 1 mi = 5280 ft

Klio2033 [76]

Answer:

I think the answer is 5.75 miles.

Step-by-step explanation:

If the drone flies 2,530 ft in 5 seconds, that means that in one minute it flies 30,360 ft. And 30,360 divided by 5,280 is 5.75.

3 0

3 years ago