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3 years ago

15

What angle measure is complementary to 87 degrees?

1 answer:

Papessa [141]3 years ago

3 0

I’m pretty sure it’s 93. since a complementary angle is equal to 180, 87 + 93 = 180

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0.7x-y=4.22<br> 5-0.8x= 0.2y

Shtirlitz [24]

The solution of the set of equation is

x=6.217

y=0.132

<u>Step-by-step explanation:</u>

given the set of equations

0.7x-y=4.22(1)

5-0.8x=0.2y

-0.8x-0.2y=-5 (2)

multiply (1) and(2) by 10

7x-10y=42.2(3)

-8x-2y=-50(4)

solve (3) and (4) using elimination method

$(4)\times 5$

⇒-40x-10y=-250(5)

(5)-(3)

-47x=-292.2

x=6.217

substituting value of x in 3

we get y=0.132

6 0

4 years ago

Could someone please help me with this: Solution set of lx^2+mx+n=0 is?

yanalaym [24]

Answer:

Quadratic equations have the solution

x = [-b +-sqr root(b^2 -4ac)] / 2a

In the given equation a = l; b = m and c = n So,

x = [-m +-sqr root(m^2 -4*l*n)] / 2*l

Step-by-step explanation:

4 0

3 years ago

Whats prime factorization of 18 least to greatest?

nexus9112 [7]

18=2×3×3. hope it helps

8 0

3 years ago

If f(x) = 2x² +5/(x-2)<br> f(3) =

katen-ka-za [31]

Answer:

23

Step-by-step explanation:

Insert 3 for "x"

$f(3)=2(3)^{2} +\frac{5}{3-2}$

f(3)=23

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4 years ago

Zack has 18 socks in his drawer. 6 are blue, 6 are red, and 6 are green. How many socks will he need to pull out to be sure he g

JulsSmile [24]

Step-by-step explanation:

two sock make one pair ..... so 2 blues socks

3 0

3 years ago