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4 years ago

Please help me!! Very important

Mathematics

2 answers:

melomori [17]4 years ago

6 0

Hello,
Let x represent the total of jumps
y represent the total “ raised the roof "

Here are two equation:
3x+2y=50
x+y=19
To solve this, I would prefer to use substitution because it is the easiest way to do:
x+y=19
Times 3 from both side
3x+3y=57
-
3x+2y=50
=
y=7
x=19-7=12. As a result, Roxanne jumps 12 , and “ raised the roof ” 7 times. Hope it help!

givi [52]4 years ago

3 0

3x+2y=50
x+y=19
x=12, y=7
12 jumps, 7 "raise the roof"s

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Your friend claims that the measure of an exterior angle of a triangle can never be acute because it is the sum of the two nonad

maks197457 [2]

Answer: No, He is not correct.

Step-by-step explanation:

Since we know that the sum of all interior angles of triangles is 180°.

And, If an exterior angle of a triangle is acute ⇒ The adjacent interior angle is obtuse

Also, we know that an exterior angle of a triangle is equal to the sum of the opposite interior angles

Therefore, the sum of two interior angles is acute.

'The total sum of the all interior angles of the triangle =One obtuse angle+ acute sum of the angles' can be equal to 180°.

For example let the exterior angle of a triangle is 80° ( acute)

Therefore, the adjacent angle of this exterior angle = 180-80=100°

And, sum of the opposite angles = 80°

Therefore total sum of the interior angles = 100 + 80 =180°

Thus, He was wrong.

5 0

4 years ago

What would be the logical answer

nekit [7.7K]

Replace the x in the expression by 0 and work it out:-

y-intercept = 2 (0)^2 - 7(0) + 9 = 9

Answer is option (4).

7 0

3 years ago

1 Aling Sol wanted to redesign her old wooden box with a dimension of 20 cm

jekas [21]

Answer:

400 cm² of stickers

Step-by-step explanation:

A wooden box has the shape of a rectangular prism.

To solve for the above question, we would be using the formula for the Surface Area of a rectangular prism to calculate how much stickers are required .

The formula for the surface area of a rectangular prism =

A=2(wl + hl + hw)

l = Length = 20cm

w = Width = 4cm

h = Height = 5m

Hence,

= 2 × (4 × 20 + 5 × 20 + 5 × 4)

=400 cm²

Therefore, 400cm² of stickers would be needed to cover the wooden box.

8 0

3 years ago

Given m || n, find the value of x and y.

BartSMP [9]

Answer:

${ \tt{x = 41 \degree}}$

Interior alternate angles.

${ \tt{y + x = 180 \degree}} \\ { \tt{y + 41 \degree = 180 \degree}} \\ { \tt{y = 139 \degree}}$

3 0

3 years ago

Read 2 more answers

PLEASE HELP ME I NEED TO DO THIS TGA

tigry1 [53]

Step-by-step explanation:

a) -2 - (-9) = 7

→ -2 + 9 = 7

as, when the bracket will be open ( - ) (-) = + so 9 will be positive and as 2 is negative they will get subtracted and as 9 is greater no. and have a positive sign so, the answer will be positive as well.

b) -2-9 = -11

as the both numbers are negative so they will get added so we got 11 and also they bith share negative sign so in addition or subtraction the result will have the same sign as the numbers which are added have.

c) -2 - (-9) - (-2) = 9

→ -2 + 9 + 2

→ -2 + 11 = 9

when both the bracket will get open so the negative sign will change with positive so 2 and 9 have a positive sign and as they have similar sign when they will get add up than they will have same sign so we will get 9+2=11, a positive 11 and as 2 is negative so they will be subtracted and 11 is greater so we will have a positive 9.

hope this answer helps you dear...and may u have a great day ahead!

6 0

3 years ago