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Westkost [7]
3 years ago
11

Use Multiplication to solve problems 18-21 #20 (1 1/4 x $9.60) x 9

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer: 108

Step-by-step explanation:

If you have a scientific calculator you can plug the entire equation in the calculator.

If you don't, work out the parentheses first.

1. Change the fraction to a decimal.

1\frac{1}{4} is equal to 1.25

2. Multiply 1.25 by 9.60

1.25 × 9.60 is 12

3. Re-write to (12) × 9

4. Mulitply 12 by 9

(12) × 9 is 108

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PLS HELP
Soloha48 [4]
(6,5)---------------(1,2)-------------------(x2,y2)
6+x2/2=1
5+y2/2=2

6+x2=2
x2=-4
y2=4-5
y2=-1
(-4,-1)

answer is C
3 0
3 years ago
How many oz. of a metal containing 40%
RideAnS [48]

Answer:

3 oz

Step-by-step explanation:

Let x represent the number of oz. of the medal with 40% gold:

Set up an equation and solve for x:

0.4x + 7(0.9) = 0.75(x + 7)

0.4x + 6.3 = 0.75x + 5.25

6.3 = 0.35x + 5.25

1.05 = 0.35x

3 = x

So, you will need 3 oz. of the metal with 40% gold

3 0
3 years ago
A quadratic function has a line of symmetry at x=-3.5 and zero at -9 what is the distance from the given zero to line of symmetr
g100num [7]

If a quadratic function has zero at x=-9, then point (-9,0) lies on the graph of quadratic function.

A line of symmetry has equation x=-3.5 that is x+3.5=0.

Use formula for the distance from point (x_0,y_0) to the line AX+By+C=0:

d=\dfrac{|Ax_0+By_0+C|}{\sqrt{A^2+B^2}}.

Thus,

d=\dfrac{|-9+3.5|}{\sqrt{1^2+0^2}}=5.5.

Answer: the distance is 5.5 units.

4 0
3 years ago
World problem in length (trigonometry) geometry not chemistry
lions [1.4K]

Answer:

≈ 47.2 m

Step-by-step explanation:

let the height from the sea to the base of lighthouse be h₁

let the height from the sea to the top of the lighthouse be h₂

using the tangent ratio in the right triangle

tan55.1° = \frac{opposite}{adjacent} = \frac{h_{1} }{610} ( multiply both sides by 610 )

h₁ = 610 tan55.1°

tan56.5° = \frac{h_{2} }{610} ( multiply both sides by 610 )

h₂ = 610 tan56.5°

then

height of lighthouse = h₂ - h₁        

                                  = 610 tan56.5° - 610 tan55.1°

                                  = 610(tan56.5° - tan55.1° )

                                 ≈ 47.2 m ( to the nearest tenth )

6 0
2 years ago
Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?
BARSIC [14]

Answer:

14π

Step-by-step explanation:

C = 2πr

D=2r

D=14

14=2r

r=7

C=2π(7)

C=14π or 43.98

4 0
3 years ago
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