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just olya [345]
3 years ago
15

Can someone help me really quick

Mathematics
1 answer:
Elena L [17]3 years ago
8 0
In your 30° - 60° - 90° triangle, the ratios of the sides are
.. PR : QR : PQ = 1 : √3 : 2

A) QR/PQ = (√3)/2 . . . . . TRUE

B) PR/PQ = 1/2, not (√3)/2 . . . . false

C) QR/PR = (√3)/1 . . . . . TRUE

D) PQ/PR = 2/1, not √3 . . . . . . .false

E) QR/PR (see C) . . . . . . . . . . .false

F) PQ/PR = 2/1 . . . . . . . .TRUE
You might be interested in
A brick layer is able to set 2.5 breaks in one minute how many bricks can you set an eight hours
frozen [14]

Answer:

<h2> In 8 hours he will set 1200 bricks</h2>

Step-by-step explanation:

In this problem, we are expected to estimate the number of bricks he can set in 8 hours.

let us convert hours to minutes we have

60 min make 1 hour

x min make 8 hours

cross multiply

x= 60*8

x= 480 min

We are assuming the same rate with which he sets 2.5 brick is the same as the rate with which he will set bricks for the 8 hours windows

so if the bricklayer sets

2.5 bricks in 1min

y bricks in 480 min

Cross multiply we have

y=2.5*480

y= 1200  bricks

hence in 8 hours, he will set 1200 bricks

5 0
3 years ago
A ​$310 suit is marked down by 20​%. Find the sale price.
loris [4]

Answer:

the answer is 62!

Step-by-step explanation:

multiply

5 0
2 years ago
Read 2 more answers
Solve the quadratic equation by completing the square.
Step2247 [10]

Answer:

x1, x2 = 4.74 , -2.74

Step-by-step explanation:

To find the roots of a quadratic function we have to use the bhaskara formula

ax^2 + bx + c

x^2 - 2x - 13

a = 1     b = -2    c = -13

x1 = (-b + √ b^2 - 4ac)/2a

x2 =(-b - √ b^2 - 4ac)/2a

x1 = (2 + √ (2^2 - 4 * 1 * (-13)))/2 * 1

x1 = (2 + √ (4 + 52)) / 2

x1 = (2 + √ 56 ) / 2

x1 = (2 + 7.48) / 2

x1 = 9.48 / 2

x1 = 4.74

x2 = (2 - √ (2^2 - 4 * 1 * (-13)))/2 * 1

x2 = (2 - √ (4 + 52)) / 2

x2 = (2 - √ 56 ) / 2

x2 = (2 - 7.48) / 2

x2 = -5.48 / 2

x2 = -2.74

6 0
3 years ago
450 g in the ratio 2:13
jonny [76]

450 g in 2:13

<u>Total proportion asked for </u>=2+13=15

<u>Now comparing g with ratio, or whatever </u>

450/15=30g \implies Therefore 1 in ratio depicts of 30g

So final answer = \boxed{60g : 390g}

\huge\mathfrak\colorbox{white}{}

More to know, daily bit of knowledge: The Binomial Theorem:

\boxed{{(a+b)} ^n= \sum_{k=0}^{n}\binom{n}{k} a^{n-k}b^{k}}

3 0
2 years ago
PLEASEEEE HELP ITS URGENT!!!!
Marrrta [24]

Answer:

f(x)=1/2x-6

Step-by-step explanation:

7 0
3 years ago
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