4 years ago

Use the order of operations to simplify this expression 4 + 0.8 x 1.5 - 3

Mathematics

1 answer:

Scilla [17]4 years ago

3 0

You would use PEMDAS to solve this:

0.8 x 1.5 = 1.2

4 + 1.2 - 3

5.2 - 3

2.2 is your answer

You might be interested in

sleet_krkn [62]

Answer:

Did you just cast a curse on me???

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Rationalize the denominator of $\frac{\sqrt{32}}{\sqrt{16}-\sqrt{2}}$. The answer can be written as $\frac{A\sqrt{B}+C}{D}$, whe

musickatia [10]

Rationalizing the denominator involves exploiting the well-known difference of squares formula,

$a^2-b^2=(a-b)(a+b)$

We have

$(\sqrt{16}-\sqrt2)(\sqrt{16}+\sqrt2)=(\sqrt{16})^2-(\sqrt2)^2=16-2=14$

so that

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{\sqrt{32}(\sqrt{16}+\sqrt2)}{14}$

Rewrite 16 and 32 as powers of 2, then simplify:

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{\sqrt{2^5}(\sqrt{2^4}+\sqrt2)}{14}$

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{2^2\sqrt2(2^2+\sqrt2)}{14}$

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{4\sqrt2(4+\sqrt2)}{14}$

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{16\sqrt2+4(\sqrt2)^2}{14}$

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{16\sqrt2+8}{14}$

$\dfrac{\sqrt{32}}{\sqrt{16}-\sqrt2}=\dfrac{8\sqrt2+4}7$

So we have A = 8, B = 2, C = 4, and D = 7, and thus A + B + C + D = 21.

3 0

3 years ago

PLS HELP h(a)= a + 3; Find h(5) a. 3 b. 8 c. 5 d. 2

Hunter-Best [27]

Answer:

B. 8

Step-by-step explanation:

(5)+3=8

6 0

3 years ago

Read 2 more answers

Show that each figure is the given type of quadrilateral. Show that BCDE is a rectangle

kiruha [24]

Need more information

7 0

3 years ago

A bus travels at 182 miles in 4 hours. How many miles can the bus travel in 1 hour?

8_murik_8 [283]

Answer: 45.5 miles

Step-by-step explanation: divide182 by 4

7 0

3 years ago

Read 2 more answers