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3 years ago

Anyone wanna help please?

Mathematics

2 answers:

maria [59]3 years ago

8 0

Answer:

sure

Step-by-step explanation:

VladimirAG [237]3 years ago

5 0

Answer:

The midpoint cannot be positive

Step-by-step explanation:

A is negative and b is positive. if i am wrong pls report to see if i need improvement i am still a high school too!

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Need some help just can’t understand

allochka39001 [22]

Answer:

Positive I think

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2 years ago

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90 is 75% of what number

Viktor [21]

Answer:

120

Step-by-step explanation:

90 x 100 ÷ 75 = 120

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2 years ago

If the if a cylinder is 7 in tall and has a volume of 63 Pi inches what is the area of the cross section it goes right down the

vitfil [10]

Answer: $9\pi \ in.^2$

Step-by-step explanation:

Given

The height of the cylinder is $h=7\ in.$

The volume of the cylinder is $V=63\pi \ in.^3$

The volume of the cylinder is the product of area and height

$\Rightarrow V=\pi r^2h\\$

Insert the values

$\Rightarrow 63\pi =A\times 7\\\\\Rightarrow A=\dfrac{63\pi}{7}\\\\\Rightarrow A=9\pi\ in.^2$

Thus, the area of the cross-section is $9\pi \ in.^2$

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2 years ago

Given that<br> x:8=2:x<br> Calculate the positive value of x.

kow [346]

Answer:

$x = 4$

Step-by-step explanation:

$x : 8 = 2 : x \\ \frac{x}{8} = \frac{2}{x} \\ \\ cross \: \: multiple \\ {x}^{2} = 16 \\ x = \sqrt{16} \\ x = 4$

4 0

3 years ago

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The lengths of the sides of the triangle are 3, 8, and 10. Is the triangle a right triangle, acute triangle, or an obtuse triang

weqwewe [10]

Answer:

Obtuse

Step-by-step explanation:

You have to make sure it is a triangle by adding the smallest and the medium sides, if the result is greater than the bigger side then it is a triangle.
you then use the Pythagorean theorem to check if the triangle is a right triangle, acute, or obtuse. If $c^{2}$ = $a^{2} +b^{2}$ then it is a right triangle. If $c^{2} >a^{2} + b^{2}$ then it is an obtuse triangle. if $c^{2} < a^{2} +b^{2}$ then it is an acute triangle.

$10^{2}$ _ $3^{2} + 8^{2}$
9+64_100
70_100
70<100

in this case $c^{2}$ is greater than $a^{2} +b^{2}$ therefore, is it an obtuse triangle.

3 0

2 years ago