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Bad White [126]
2 years ago
14

А,

Mathematics
1 answer:
miss Akunina [59]2 years ago
7 0

Answer:

\displaystyle 35

Explanation:

Complementary Angles sum up to ninety degrees, so do the following:

\displaystyle 90° = 55° + m\angle{DEF} \\ \\ 35° = m\angle{DEF}

I am joyous to assist you at any time.

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Convert 0.3185 degrees to minutes and seconds. Round to the nearest second
Ymorist [56]
19 minutes and 16 seconds . because there are 60 minutes in every degree . and 60 seconds in every minute. so, if you take 0.3185 x 60 = 19.11 minutes . —-> 19.11 min. x 60 = 6.6 seconds .

so therefore the answer is 19 min. &’ 16 sec.
8 0
3 years ago
The distance to school from Steven's house is 3/5 of a mile. Steven walked 2/3 of the way there and stopped to rest. How far did
galina1969 [7]

Answer:

2/5 of a Mile

Step-by-step explanation:

Total mikes from school to Steven house = 3/5 of a Mile

If Steven walked 2/3 of the way there, the distance he walked =2/3×3/5 = 2/5

If he stopped the rest, then the distance he travelled before stopping is 2/5 of a Mile

7 0
3 years ago
Find the total surface area of the cone in the figure. ( use rr=3.14.)
nikitadnepr [17]

Answer:

Answer D

Step-by-step explanation:

The formula is A = pi r(r+\sqrt{h^2+r^2}). We have our r (radius) and h (height), so plugging it all in would give us A = (3.14)(5 + sqrt(12^2)+(5^2). After computing this, you would get answer D, 282.6.

4 0
3 years ago
Find the zeros of the quadratic equation-<br> v(5v-7)=0
vovangra [49]

Answer:

Step-by-step explanation:

v(5v-7)=0

We multiply parentheses

5v^2-7v=0

a = 5; b = -7; c = 0;

Δ = b2-4ac

Δ = -72-4·5·0

Δ = 49

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

v1 = −b−√Δ/2a

v2 = -b+√Δ/2a

√Δ = √49 = 7

v1 = -(−7)−7/2*5 = 0/10 = 0

v2 = -(−7)+7/2*5 = 14/10 =  1+2/5

3 0
3 years ago
The length of a rectangle is 6 meters more than its width. If the area is 135 square meters, what is its width?
Novay_Z [31]
Length = width +6

L * (L - 6) = 135

L^2 - 6L = 135

L^2 - 6L -135 = 0

Length = 15
Width = 9


4 0
4 years ago
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