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3 years ago

Pleeeaassseee brainliest to first person

Mathematics

2 answers:

goldenfox [79]3 years ago

8 0

Answer:

by using Pythagoras law

hypotenuse ²=perpendicular ²+base²

h²=100²+80²

h²=10000+6400

h=√16400=128.06m

128m is the required answer.

Fiesta28 [93]3 years ago

3 0

Answer:

B. 128

Step-by-step explanation:

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Solve using the quadratic formula x2 - 6x - 40=0 Question options: x = 10 or x = -4 x = 4 or x = -10 x = -7 or x = 7 x = -4 - √7

Crazy boy [7]

Answer:

$x=-10$ or $x=4$

Step-by-step explanation:

$ax^2+bx+c=0$

$x^2-6x-40=0$

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-6\pm\sqrt{6^2-4(1)(-40)}}{2(1)}$

$x=\frac{-6\pm\sqrt{36+160}}{2}$

$x=\frac{-6\pm\sqrt{196}}{2}$

$x=\frac{-6\pm14}{2}$

$x=-3\pm7$

$x=-10$ or $x=4$

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3 years ago

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the length of a rectangle is 3 times its width. the perimeter is 55. find the length and width of the rectangle

Shkiper50 [21]

Answer:

Step-by-step explanation: L= length w= width p= perimeter

L=3W p=55CM

P. of rectangle= 2(l+w)=55cm

L+w= 55/2= 27.5 cm

3w+w=27.5cm

4w=27.5cm

w=27.5/4=6.875cm w=6.875cm L= 3w=6.875*3=20.625cm

4 0

3 years ago

C is the circumcenter of APQR. PC=3x+7, RC=5x-15, & QC=51-X x=[?]

amm1812

Answer:

x = 11

Step-by-step explanation:

C is the circumcenter of $\triangle PQR$

$\implies PC=QC=RC$ (Radii of same circle)

$\implies RC=QC$

$\implies 5x-15=51-x$

$\implies 5x +x=51+15$

$\implies 6x =66$

$\implies \: x = \frac{66}{6} \\ \\ \implies \: \huge \: \red{x = 11}$

8 0

3 years ago

4*f^2-G+f^2+2g Simplify the answer

Goshia [24]

4f^2-g+f^2+2g

Collect f terms,

5f^2-g+2g

Collect g terms,

5f^2+g

Et viola

Hope this helps :)

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3 years ago

Blank thousands= 3,000 ones

lawyer [7]

3 thousands is the answer :)

6 0

3 years ago

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