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3 years ago

PLS HELP ASAP! GIVING BRAINLY ignore the highlighted answer

Mathematics

2 answers:

polet [3.4K]3 years ago

7 0

35√5. If you solve 5√245 you get 78.26, and if you solve 38√5 you get 78.26, meaning they are equivalent.

gladu [14]3 years ago

3 0

Answer:

the first one

35 (that symbol i cant find it on the computer) 5

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Let f(x) = cos(x) + 2x. Where does f have critical points?

adell [148]

Answer:

f has no critical points.

Step-by-step explanation:

We are given:

$f(x)=\cos(x)+2x$

A function has critical points whenever its derivative equals 0 or is undefined.

Differentiate the function:

$f'(x)=-\sin(x)+2$

Since this will never be undefined, solve for its zeros:

$0=-\sin(x)+2$

Hence:

$\displaystyle \sin(x)=2$

Recall that the value of sine is always between -1 and 1.

Thus, no real solutions exist.

Therefore, f has no critical points.

6 0

3 years ago

Work out the area of the trapezium ABDE. B 9 cm 6 cm 8 cm →D E

Evgen [1.6K]

Answer:

Area of the trapezium ABDE = 30 cm²

Step-by-step explanation:

Area of a trapezium = $\frac{1}{2}(b_1+b_2)h$

Here, $b_1$ and $b_2$ are the parallel sides of the trapezium

h = Distance between the parallel sides

From the picture attached,

ΔCAE and ΔCBD are the similar triangles.

So by the property of similarity their sides will be proportional.

$\frac{AE}{BD}= \frac{CE}{CD}$

$\frac{9}{6}=\frac{CE}{8}$

CE = $\frac{9\times 8}{6}$

CE = 12 cm

Therefore, DE = CE - CD

DE = 12 - 8 = 4 cm

Now area of trapezium ABDE = $\frac{1}{2}(AE+BD)(DE)$

= $\frac{1}{2}(6+9)4$

= 30 cm²

Therefore, area of the trapezium ABDE = 30 cm²

8 0

3 years ago

There is a rectangular section of his yard. the perimeter of the section is 27 feet and the are is 35 square feet find the lengt

Advocard [28]

Answer:

2L^2 - 27L + 70 = 0.

Step-by-step explanation:

p = 2(L + W)

27 = 2L + 2W

2W = 27 - 2L

W = (27 - 2L)/2

Substitute for W in the area equation:

A = LW

35 = (27 - 2L) * L / 2

L(27 - 2L) = 70

-2L^2 + 27L - 70 = 0 Multiply through by -1:

2L^2 - 27L + 70 = 0

6 0

3 years ago

A ring cost $27 more than a pair of earrings the ring cost $90 right and Quetion that can be used to find the cost see in dollar

Natalka [10]

Wouldn't this be $90-$27 which is 63, 63 being the cost of your earrings

6 0

4 years ago

Read 2 more answers

The figure below has a volume of 60 cubic units. How many more cubes will it take to fill the figure?

MariettaO [177]

55 cubic units because
- each cube is equal to 1 cubic unit
- the total volume is 60 cubic units
- 5 cubes are already inside

6 0

3 years ago