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Misha Larkins [42]
3 years ago
8

Please help me if you know this​

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
3 0
First you have to subtract 1.3 from 0.75 which equals -0.55. Then you have to add 3/7 to 2 which equals 2 and 3/7. Then you divide 2 and 3/7 by -0.55 which equals 0.9785 and that’s your answer. Sorry I don’t know the answer for the second problem but I hope this helped.
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Square root of 28<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B28%7D%20" id="TexFormula1" title=" \sqrt{28} " alt=" \sqrt{2
lidiya [134]
The square root of 5.29150262213

4 0
4 years ago
Help me please !! i need the answer
madam [21]

Answer:

PQ=22\\\\QR=7\\\\PR=29

Step-by-step explanation:

To find the value of y, you can create an equation where two parts of the line are equal to the whole line:

PQ+QR=PR

Substitute given values:

(8y+6)+(y+5)=(19y-9)

Solve for y. Simplify parentheses:

8y+6+y+5=19y-9

Combine like terms to simplify the equation:

8y+y+6+5=19y-9\\\\9y+11=19y-9

Get the variable on one side of the equation and the constants on the other. Add 9 to both sides:

9y+11+9=19y-9+9\\\\9y+20=19y

Subtract 9y from both sides:

9y-9y+20=19y-9y\\\\20=10y

Isolate the variable. Divide both sides by 10:

\frac{20}{10} =\frac{10y}{10} \\\\y=2

The value of y is 2. Insert this value into each line segment value and solve:

PQ=8(2)+6\\\\PQ=16+6\\\\PQ=22

QR=(2)+5\\\\QR=7

PR=19(2)-9\\\\PR=38-9\\\\PR=29

:Done

You can check by using:

PQ+QR=PR\\\\22+7=29

This statement is true, so the values are correct.

7 0
3 years ago
Find the surface of this triangular prism please
Daniel [21]

Answer:

270cm²

Step-by-step explanation:

The formula is given as

S = bh × l (s1 + s2 + h)

l = 7cm

h = 5cm

s1 = 12 cm

s2 = 13cm

b = 12 cm

Surface Area = 12 cm × 5 cm × 7 cm(12 cm+ 13 cm+ 5cm)

= 60cm² × 7 cm(30 cm)

= 60cm² + 210 cm²

= 270 cm²

3 0
3 years ago
Marco is building a house. he bought lots of wood to make the frame of the house. he wants right angles for his corners. if he u
Ierofanga [76]
The other angle is adjacent to 55 degrees which means:

55+x=180

x=125 so it 125 degrees
3 0
4 years ago
Use the law of sines to find side b.
schepotkina [342]

Answer:

83.3

Step-by-step explanation:

8 0
3 years ago
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