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3 years ago

Please help i will mark braniliest and 30 points

Mathematics

1 answer:

serious [3.7K]3 years ago

6 0

Answer:

D) x = -8

Step-by-step explanation:

All the values less than 7 are included in the number line. The graph on number line is shown in figure attached. In the options given, all values in Option A, B and C are greater than 7 so these cannot be included.

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2. Solve for x. SHOW YOUR WORK.

garik1379 [7]

Answer:

x=9

Step-by-step explanation:

The two labelled angles are equal, so we can construct an equation. Then, we solve the equation for x.

$4x+2=7x-25\\2=3x-25\\3x=27\\x=9$

First, we subtract 4x from both sides. Next, we add 25 to both sides. Finally, we divide both sides by 3.

8 0

3 years ago

What is equivalent to (x+y+2) (y+1)

ohaa [14]

Xy+x+y^2+3y+2 this is the answer

5 0

3 years ago

The equatorial diameter of a model of earth is 25.6 cm. What is the total surface area of the model

Arisa [49]

Answer:

$2059.7\,\,cm^2$

Step-by-step explanation:

Diameter of a model of earth (D) = 25.6 cm

Radius of a model of earth (r) = $\frac{D}{2}=\frac{25.6}{2}=12.8\,\,cm$

Earth has the shape of a sphere.

Total surface area of a sphere = $4\pi r^2$

Put $\pi=\frac{22}{7}\,,\,r=12.8\,\,cm$

So,

Total surface area of the model $=4(\frac{22}{7})(12.8)^2=2059.7\,\,cm^2$

7 0

3 years ago

Free Brainliest!!!!!!!!!!!OMG!!!!!!FREE BRAINLIEST

Alona [7]

Answer:

cool give it tome plz

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

when a cannonball is fired, the equation of its pathway can be modeled by h=-16t squared + 128t. find the time it will take for

Rashid [163]

At the time the cannonball reaches the ground, the vertical height of the cannonball from the ground is 0, i.e. h = 0.

Thus, the time it will take the cannonball to reach the ground is given by

$-16t^2+128t=0 \\ \\ \Rightarrow t(-16t+128)=0 \\ \\ \Rightarrow t=0\ or\ -16t+128=0 \\ \\ \Rightarrow16t=128 \\ \\ \Rightarrow t= \frac{128}{16} =8$

Therefore, it will take the cannonball 8 seconds to reach the ground.

5 0

4 years ago