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Mrac [35]
3 years ago
5

What is the answer to: 8+(n-4)

Mathematics
1 answer:
Nonamiya [84]3 years ago
5 0
4+n symplify the equation 8+(n-4) and you will get 4+n
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In ΔQRS, the measure of ∠S=90°, the measure of ∠Q=29°, and SQ = 5 feet. Find the length of QR to the nearest tenth of a foot.
goldfiish [28.3K]

Answer:

2.8 feet

Step-by-step explanation:

tan(29)=x/5

5tan(29)=x

2.8=x

8 0
2 years ago
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Which expression is equivalent to 2(x + 7) - 18x+<br> 4/5 ?
Serjik [45]

Answer:

-16x + 14 4/5

Step-by-step explanation:

Perform the indicated multiplication.  We get:

2x + 14 - 18x + 4/5

Next, combine like terms:  We get:

-16x + 14 4/5

3 0
3 years ago
In a 5/6 pound mixture of sand and gravel, 1/4 pound is gravel.
USPshnik [31]
<span>Total mass of mixture is given as 5/6 pound, in which 1/4 pound is gravel. Amount of sand in the mixture will be 5/6 - 1/4 = 7/12 So, the ratio of sand to that of gravel in given mixture is 7/12:1/4 = 7:3. i.e every 10 parts of mixture contain 7 parts of sand and 3 parts of gravel. If we are given 1-pound of same mixture, it will contain 1 * 3/10 pound gravel, i.e. 0.3 pound.</span>
8 0
3 years ago
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Use a calculator to evaluate sec 85°. a:-1.016. b:-5.679. c:1.004. d:11.474
KatRina [158]
The correct answer to this question is this one: "D. 11.474"

your calculator probably doesn't do "secant". But sec is 1/cos
so do cos(85) (in degree mode, not radian mode) then "invert it": 1 / ANS or x^-1 if you have that key

or type
1/cos(85 degrees)= <span>11.4737</span>
7 0
3 years ago
Calculate the perimeter of the composite figure. Round your answer to the nearest hundredth. Use 3.14 for $\pi$ .
Elena-2011 [213]

1. Perimeter is 3 + 3 +3 +4 +5 = 18 feet

 Area = 3*3 = 9, 1/2*3*4 = 6, 9 + 6 =15 square feet

2. perimeter = 2.5 +2.5+ 2.5+2.5+0.5+0.5 = 11 meters

  Area = 3*.5 = 1.5, 3*2=6,  6+1.5 = 7.5 square meters

3. perimeter = 3.14*2*3 = 18.84 +8 = 26.8 inches

  Area = 6*4 = 24 + 3.14*3^2 = 28.26 = 28.26 +24 = 52.3 inches  

4. surface area = 2*π*6*20+2*π*6^2= 980.2 yards

Volume = π*6^2*20 = 2261.9 cubic yards

5.surface area = 2*(9*7+2*2+2*9) = 190 cm

Volume = 2*7*9 = 126 cubic cm

6. surface area = 2*(11*11+11*11+11*11) = 726 mm

 Volume = 11 *11*11 = 1331 cubic cm

3 0
2 years ago
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