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2 years ago

Which answer choice shows 4 + 0.3 + 0.09 written in standard form?

Mathematics

2 answers:

puteri [66]2 years ago

8 0

Solution:

A few changes were made:

4 as 4.00.
0.3 as 0.30

New equation:

4 + 0.3 + 0.09 = 4.00 + 0.30 + 0.09

Solving the equation:

4.00 + 0.30 + 0.09
=> 4.39 (Refer to image for work)

Correct option is B.

katrin [286]2 years ago

3 0

Answer:

Step-by-step explanation:

4 + 0.3 + 0.09 = 4.39

standard form is written in the form of $a \times 10^n$ , where $a$ is a number bigger than or equal to 1 and less than 10.

Therefore, 4.39 written in standard form is $\mathsf{4.39 \times 10^0}$

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Solve the simultaneous equations 8 x + 5 y = 28 4 x + 5 y = 16

Nostrana [21]

Answer:

x=3, y=0.8

Step-by-step explanation:

8x+5y=28

4x+5y=16

Subtract the second simultaneous equation from the first.

You are left with: 4x=12

12/4=3

x=3

Substitute this back into one of the equations.

8(3)+5y=28

8*3=24

28-24=4

4=5y

4/5=0.8

y=0.8

5 0

3 years ago

Read 2 more answers

A convex heptagon has interior angels of 125, 155, 95, 135, 120, and 115. What is the measure of the 7th angle?

wel

Sum of those 6 angles is 745 degrees
7th angle should make it equal 900
900-745=155

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3 years ago

Five people are at a party. Everyone shakes hands once with everyone else. How many handshakes are there? Show your

11111nata11111 [884]

Answer:

they exchanged 25 handshakes total

Step-by-step explanation:

5 x 5 = 25

May I have brainliest please? :)

3 0

3 years ago

Please help me. I will give first person brainliest.

pychu [463]

Question 3:

Since, EG = EF + FG

$64 = 2x-2+3x+1$

$64 = 5x -1$

$65 = 5x$

x = 13

So, EF = $2x-2$

= $(2 \times 13)-2 = 26-2=24$

So, EF = 24 units.

Question 4:

Since, $XY \cong YZ$

So, $XY = YZ$

$9x-7 = 3x+5$

$6x = 12$

So, x =2

Question 5:

Since, $XY \cong YZ$

By being congruent, the measures of the segments are equal.

So, $9x-7 = 3x+5$

$9x - 3x = 12$

$6x = 12$

So, x = 2

Now, XZ = $XY + YZ$

XY = 9x - 7 = $(9 \times 2) - 7 = 11$

YZ = 3x + 5 $= (3 \times 2) + 5 = 11$

XZ = XY + YZ = 11 + 11 = 22 units.

Question 6:

It is given that $m \angle ABC \cong m \angle DBE$

It means that the measures of these two angles are equal.

Since, measure of angle ABC is 35 degrees.

Therefore, the measure of angle DBE is 35 degrees.

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3 years ago

Given that tan(x)= -4/7, and 270 degrees< x< 360 degrees, what is the exact value of sec(x)

Maurinko [17]

Answer:

sec(x) = 1.15

Step-by-step explanation:

We can figure out what x is by using the arctan(x) function:

$x = arctan(-\frac{4}{7}) = -29.74$

So, now let's figure out the cos(x) as sec(x) is equal to the reciprocal of cos(x):

$cos(-29.74) = 0.87$

Let's take the reciprocal:

$sec(x) = \frac{1}{cos(-29.74)} = 1.15$

And that's your answer.

4 0

3 years ago