1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
solmaris [256]
3 years ago
13

What is the value of x A. 20 B. 34 C. 60 D. 69

Mathematics
1 answer:
Grace [21]3 years ago
4 0

Answer:

A

Step-by-step explanation:

The given angles are vertical and thus congruent, so

3x = x + 40 ( subtract x from both sides )

2x = 40 ( divide both sides by 2 )

x = 20 → A

You might be interested in
Emily bought 63 yards of fabric to make curtains.
olganol [36]

Answer:

<u>2268 inches of fabric</u>

Step-by-step explanation:

There are 36 inches in 1 yard. Therefore, we multiply 36 by 63 to get an answer of 2268.

<u>Therefore, Emily bought </u><u>2268</u><u> inches of fabric</u>

7 0
3 years ago
Read 2 more answers
After putting $5,500 as a down payment on a car, you pay $400 per month for 60 months to pay off your car. What was the total yo
Y_Kistochka [10]

Answer:

$29500

Step-by-step explanation:

Given data

The number of months is 60

the downpayment is $5,500

the monthly payment is $400

Let the function for the total payment be given as

y=mx+c

y= 400(60)+5500

y=24000+5500

y= 29500

Hence the total paid for the car is $29500

7 0
3 years ago
Fatima wants to find the value of sine theta, given cotangent theta = four-sevenths. which identity would be best for fatima to
Olin [163]

By using trigonometric relations, we will find that:

sin(θ) = (√33)/7 = √(33/49)

<h3>How to find the value of the sine?</h3>

Remember that for a right triangle, we have the relations:

cos(a) = (adjacent cathetus)/(hypotenuse)

sin(a) = (opposite cathetus)/(hypotenuse).

Here we know that:

cos(θ) = 4/7

Then we can say that we have a triangle with an adjacent cathetus of 4 units and a hypotenuse of 7 units. Now we need to find the other cathetus.

opposite cathetus = √(7^2 - 4^2) = √33

Then we can write:

sin(θ) = (√33)/7 = √(33/49)

If you want to learn more about trigonometry.

brainly.com/question/8120556

#SPJ4

3 0
2 years ago
Element X is a radioactive isotope such that its mass decreases by 59% every day. If an experiment starts out with 390 grams of
miss Akunina [59]

Answer:

The function that represents the mass of the sample after t days is A(t) = 390(0.41)^t.

The percentage rate of change per hour is of -2.46%.

Step-by-step explanation:

Exponential amount of decay:

The exponential amount of decay for an amount of a substance after t days is given by:

A(t) = A(0)(1-r)^t

In which A(0) is the initial amount, and r is the decay rate, as a decimal.

Element X is a radioactive isotope such that its mass decreases by 59% every day. The experiments starts out with 390 grams of Element X.

This means, respectively, that r = 0.59, A(0) = 390

So

A(t) = A(0)(1-r)^t

A(t) = 390(1-0.59)^t

A(t) = 390(0.41)^t

The function that represents the mass of the sample after t days is A(t) = 390(0.41)^t.

Hourly rate of change:

Decreases by 59% every day, which means that for 24 hours, the rate of change is of -59%. So

-59%/24 = -2.46%

The percentage rate of change per hour is of -2.46%.

5 0
3 years ago
16.43 7 rounded to the nearest tenth is 16.4 true or false is it true
storchak [24]
It is true. here is how........
4-0 is rounding down
5-9 is rounding up
when rounding to the tenths place you look at the hundredths place to find the answer.
3 0
3 years ago
Other questions:
  • A quality control manager at an auto plant measures the paint thickness on newly painted cars. A certain part that they paint ha
    8·1 answer
  • Gina wrote that 4/5 is greater than 0.75. Is Gina correct? Explain why or why not
    6·2 answers
  • Does 1 cup equal 8 ounces
    10·2 answers
  • Which expression is equivalent to (3x-5y)+(x+2y)<br><br> A.4x-7y<br> B.4x-3y<br> C.4x+3y<br> D.4x7y
    15·2 answers
  • F(x)=x^2. what is g(x)?
    11·1 answer
  • The sales tax in mikes city is 8.25%. Mike buys a sweater for 49.95 and two pair of slacksfor 68.59 each and a suit for 429.99,
    14·1 answer
  • A circular lollipop has a radius of 1.5 inches. What is the area of the lollipop to the nearest hundredth of a square inch?
    6·1 answer
  • For each pair of mathematical expressions, determine if the expressions have equal values. Select each pair of expressions that
    13·1 answer
  • What are the names for the parts of a right triangle are choose multiple :
    14·2 answers
  • A rectangle has an area of 20 square centimeters.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!