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MaRussiya [10]
3 years ago
12

Hich expressions are equivalent to 4(4a+5) Choose 3 answers:

Mathematics
1 answer:
zhuklara [117]3 years ago
3 0

Answer:

16a+20

4(5+4a)

20+16a

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A) 2 / 7 + 3 / 7 = ? b) 5 / 8 + 7 / 8 = ? c) 2 / 3 - 1 / 2 = ?
sergeinik [125]

Answer: A=5/7. B=3/2. C=1/6

D=3/5. E=14/11. G=5/7 H=3/2 I=1/6 j=3/5 K=14/11 L=7/8

Step-by-step explanation:

8 0
3 years ago
Please help! <br> what is the value of x, y, and z?
Julli [10]

Answer:

z=125

y=30

Step-by-step explanation:

x and z are the same because of the congruent sides then is triangle sum

6 0
3 years ago
Read 2 more answers
A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed, t
matrenka [14]

Answer:

509.35 feet

Step-by-step explanation:

16°23' means 16 degrees and 23 minutes.  A minute is 1/60 of a degree.

16°23' = 16 + (23/60) = 16.383°

Similarly:

49°29' = 49 + (29/60) = 49.483°

When the boat is first noticed:

tan(16.383°) = 200 / a

a = 200 / tan(16.383°)

a = 680.27

When the boat stops:

tan(49.483°) = 200 / b

b = 200 / tan(49.483°)

b = 170.92

So the difference is:

a − b = 680.27 − 170.92 = 509.35

The boat traveled 509.35 feet from the time it was first noticed to the time it stopped.

3 0
3 years ago
Please answer correctly !!!!!! Will mark brainliest !!!!!!!!!!!!!
Leni [432]

Answer:

At the time of launch height of the object was 60 meters.

Step-by-step explanation:

An object was launched from a platform and its height was modeled by the function,

h(x) = -5x² + 20x + 60

Where x = time or duration after the launch

At the time of launch, x = 0

So, by putting x = 0 in this equation,

h(0) = -5×(0) + 20×(0) + 60

h(0) = 60

Therefore, at the time of launch height of the object was 60 meters.

4 0
3 years ago
Which equation can be solved using the expression StartFraction negative 3 plus-or-minus StartRoot (3) squared + 4 (10) (2) EndR
katen-ka-za [31]

Answer: B.  2 = 3x + 10x2

Step-by-step explanation:

This is the concept of quadratic equations; We required to find the type of equation that can be solved using the model that has been used to solve the equation such that the answer is:

[-3+-sqrt(3^2+4(10)(2))]/(2(10))

The formual that was applied here was a quadratic formula given by:

x=[-b+\-sqrt(b^2-4ac)]/2a

whereby from the our substituted values above,

a=10,b=3 and c=-2

such that the quadratic equation will be:

10x^2+3x-2 

3 0
4 years ago
Read 2 more answers
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