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2 years ago

Not quite sure how to work this out

Mathematics

1 answer:

Zina [86]2 years ago

5 0

you have the hypotenuse and the opposite side so you will use sin
sin58= (30/q)
multiply both sides by q
q(sin58)=30
divide by sin58 in your calculatior
q=(30/sin58)
^ I don't have a calculator with me so you will need to plug that in

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7x-2y=16 11x+6y=32.3 how to solve this math problem

Aneli [31]

Answer:

Step-by-step explanation:

These types of equations are called simultaneous equations and the method we can use to solve these type of equations is either Substitution, Elimination and Graphing.

We use substitution here because it is easier.

Equation 1

$7x-2y=16$

Equation 2

$11x+6y=32.3$

Lets take equation 1

$7x-2y=16\\7x=16+2y\\x=\frac{16+2y}{7}$

This is our equation 3 , now put it inside equation 2.

$11x+6y=32.3\\11(\frac{16+2y}{7} )+6y=32.3\\\frac{176+22y}{7} +6y=32.3\\\frac{176+22y+42y}{7}=32.3\\176+22y+42y=226.1 \\\\42y+22y=226.1-176\\64y=50.1\\y=\frac{50.1}{64} \\y=0.783\\$

We found the value of y , now to find the value of x insert the value of y in equation 3

$x=\frac{16+2y}{7}\\x=\frac{16+2(0.783)}{7} \\x=\frac{16+1.566}{7}\\x=\frac{17.566}{7}\\x=2.509$

Solved ! See the attached image on both the straight line graphs i have attached for better understanding. Where both the lines intersect each other is our value of (x , y) respectively.

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2 years ago

Given the diagram below find the value of x if the area is 21 aquare meters

Oksanka [162]

Answer:

The answer is 7!

Step-by-step explanation:

(x-4) (x) = 21, x^2 - 4x = 21, x^2 - 4x - 21 = 0, (x - 7) (x + 3) = 0, x = 7 and -3; x can't be negative so the answer is 7!

x = 7 and x - 4 (other side) = 3

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2 years ago

-8=-16+m pls show work! ty

rosijanka [135]

Answer:

-8=-16+m

-8+16=m

m=8

I would appreciate if my answer is chosen as a brainliest answer

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2 years ago

Read 2 more answers

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lions [1.4K]

D they all have the same slope.

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3 years ago

Myra takes 2hours to plant 50 flower bulbs. Francis takes 3 hours to plant 45 flower bulbs. Working together, how long should it

crimeas [40]

Answer:37 and half hrs

Step-by-step explanation:

This is what I get

Myra: 50/2= 25 bulbs/hr.

Francis: 45/3= 15 bulbs/ hr

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3 years ago