All categories

3 years ago

Estimate the sum of 487 and 310

Mathematics

2 answers:

IrinaVladis [17]3 years ago

5 0

The exact answer is 797. You can put 800 as an estimate

lianna [129]3 years ago

4 0

If you do it by 100s
500+300=800

You might be interested in

The original price of a car is $25000. Each year, its value depreciates (loses value) by 13%. Three years after its purchase, wh

Thepotemich [5.8K]

Answer:

$16,462.58

Step-by-step explanation:

25000(1-.13)^(n)

where n is the years

25000(.87)^3

put this into a calculator and get

16462.57

5 0

3 years ago

Triangle X Y Z is shown. Angle X Z Y is a right angle. Angle Z X Y is 60 degrees and angle X Y Z is 30 degrees. The length of hy

vladimir1956 [14]

Answer:

StartFraction StartRoot 3 EndRoot Over 3 EndFraction

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

we know that

In the right triangle XYZ

$cos(Y)=\frac{ZY}{XY}$ ---> adjacent side divided by the hypotenuse

substitute the values

$cos(30\°)=\frac{ZY}{4}$

Remember that

$cos(30\°)=\frac{\sqrt{3}}{2}$

substitute

$\frac{\sqrt{3}}{2}=\frac{ZY}{4}$

$ZY=(4)\frac{\sqrt{3}}{2}$

$ZY=2\sqrt{3}\ units$

step 2

$sin(Y)=\frac{XZ}{XY}$ --> opposite side divided by the hypotenuse

substitute the values

$sin(30\°)=\frac{XZ}{4}$

Remember that

$sin(30\°)=\frac{1}{2}$

$\frac{1}{2}=\frac{XZ}{4}$

$XZ=2\ units$

step 3

$tan(Y)=\frac{XZ}{ZY}$ --> opposite side divided by adjacent side

substitute the values

$tan(Y)=\frac{2}{2\sqrt{3}}$

$tan(Y)=\frac{1}{\sqrt{3}}$

Simplify

$tan(Y)=\frac{\sqrt{3}}{3}$

StartFraction StartRoot 3 EndRoot Over 3 EndFraction

7 0

3 years ago

Read 2 more answers

2<br> 2. Evaluate (a + y)+ 2y if a = 5 and y = -3.<br> F 58<br> G -2<br> H 70<br> J 10

NARA [144]

<h3>Answer: G) -2</h3>

=======================================================

Explanation:

I'm assuming you meant to say (a+y)^2 + 2y

Replace each copy of 'a' with 5. Replace each copy of 'y' with -3. Use PEMDAS to simplify.

(a+y)^2 + 2y

(5 + (-3))^2 + 2(-3)

(5-3)^2 + 2(-3)

(2)^2 + 2(-3)

4 + 2(-3)

4 - 6

-2

So (a+y)^2 + 2y = -2 when a = 5 and y = -3.

3 0

2 years ago

Simplify<br> Square root of 224

Mariulka [41]

$\sqrt{224} = \sqrt{16 \times 14} = \sqrt{16} \times \sqrt{14} =4 \sqrt{14}$

8 0

3 years ago

K/w = v-w , for x indicated variable

brilliants [131]

Answer:

x=k/v-w

Step-by-step explanation:

The first w I'm guessing you meant the x? Hope this helped!

6 0

3 years ago