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2 years ago

The measure of two angles are (3x+20) and (5x - 2). What is the value of x if the

Mathematics

1 answer:

adelina 88 [10]2 years ago

8 0

Answer:

x = 9

Step-by-step explanation:

angle 1 plus angle 2 equals 90 because they are complementary. combining like terms gives you 8x + 18 = 90. then you get 8x = 72, which means that x equals 9

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The difference between a number and its square is 20. Find the<br>numbers.

Elena L [17]

Answer:

-4 or 5

Step-by-step explanation:

let number be x

x²-x=20

Rearrange

x²-x-20=0

(x+4)(x-5)=0

Separate

x+4=0, x-5=0

x=-4 or 5

4 0

2 years ago

Which statement Is best represented by the inequality d<0.35? A. The pen cost less than $0.35. B. The pencil costs greater th

ankoles [38]

Answer:

Option A, The pen cost less than $0.35.

Step-by-step explanation:

The given inequality is d ∠ 0.35

Now we have to define this inequality with the help of given options.

If d represents the cost of pen, then cost of pen should be less than 0.35.

Option A, The pen cost less than $0.35. is the answer.

5 0

2 years ago

Which expressions are equivalent to (2 Superscript 5 Baseline) Superscript negative 2? 2–10 and StartFraction 1 Over 20 EndFract

Serggg [28]

Answer:

$\frac{1}{2^{10}} \ and\ \frac{1}{1024}$

Step-by-step explanation:

Given

$(2^{5})^{-2}$

Required

Find the equivalent;

To find the equivalent of the given expression, we make use of laws of indices;

Using the following law of indices;

$(a^m)^n = a^{m*n}$

So;

$(2^{5})^{-2}$ becomes

$(2^{5})^{-2} = 2^{5*-2}$

$(2^{5})^{-2} = 2^{-10}$ ------------ This is one equivalent

Solving further;

Using the following law of indices;

$a^{-m} = \frac{1}{a^m}$

So;

$(2^{5})^{-2} = 2^{-10}$ becomes

$(2^{5})^{-2} = \frac{1}{2^{10}}$

$2^10 = 1024$

Hence;

$(2^{5})^{-2} = \frac{1}{1024}$

Conclusively; the equivalents of $(2^{5})^{-2}$ are $\frac{1}{2^{10}} \ and\ \frac{1}{1024}$

4 0

3 years ago

Greg has decreased his running time by minute each of the last six weeks. Write an expression to represent the total change in h

Anettt [7]

Total change in relation to when Greg first started decreasing his run time : -6 minutes (at the end of 6 weeks)

Expression : -x (x is the number of weeks)

6 0

3 years ago

Answer all question for brainliest

Neporo4naja [7]

Answer:

this shows that the height of 13 year old females in one class is less variable than the other class.
this means that the height of students in class with range 6 may vary from person to person while that in class with range 3 maybe clustered around one another.
we're expected to see students of almost same height in class ,with range 3, more than the students in class with range 6.

arranging the values in ascending order

2, 2, 4, 4, 4, 5, 6, 6, 6, 8, 8, 9

$mean = \frac{ sum \: of \: all \: observations}{total \: number \: of \: observations}$