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3 years ago

the distance between earth and the moon is about 238,900 miles. round this number to the nearest ten thousand

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

3 0

Answer:

The answer is 240,000

Step-by-step explanation:

Look at the number to the right of the ten-thousands place which is 8. If the number to the right of the ten-thousands is 5 or above round the number up, 4 or below round the number down.

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Mrs.Jackson is filling planter boxes with soil. She has soil that is 27% sand and she buys 8 pounds of a commercial potting soil

cluponka [151]

(27x + 16*8)/x+8 = 19

(27x +128) /x+8 = 19

multiply both sides by x+8

27x+128 = 19x +152

subtract 19x from both side:

8x +128 = 152

subtract 128 from both side:

8x = 24

divide both sides by 8

x = 24 /8

x = 3 pounds

6 0

4 years ago

Perform the indicated operation and simplify the result.

Finger [1]

Answer:

7/ (3a-1)

Step-by-step explanation:

3a^2 -13a +4 28+7a

------------------ * --------------------

9a^2 -6a+1 a^2 -16

Factor

(3a-1)(a-4) 7(4+a)

------------------ * --------------------

(3a-1) (3a-1) (a-4)(a+4)

Cancel like terms

1 7

------------------ * --------------------

(3a-1) 1

Leaving

7/ (3a-1)

3 0

3 years ago

2x-3y=-11. 3x+2y=20 system of equations I'm not good at these at all I still can't solve any of them

baherus [9]

Okay, so you what you would is solve one equation for Y=mx+b and then substitute this equation for Y so the answer would be Y=-3/2x + 20
And then you would do 2x-3(-3/2x+20)=-11 and you solve it for x
But to get y you would substitute what you got for x into ether equations.

5 0

3 years ago

HELP ME FAST PLEASE! <br>y varies directly with x, and y=2. What is the value of y when x=5?

stealth61 [152]

my answer would be 10, but I might be wrong

4 0

3 years ago

Question 9 - (3 marks available)

navik [9.2K]

Image of the triangle is attached

Answer:

24 cm

Step-by-step explanation:

If two triangles are similar, the corresponding sides must be in the same ratio.

From the diagram, the height of the triangle is 36cm.

But the height of triangle ABE = h,

To find the height of triangle BCD, let's subtract the height of triangle ABE from 36cm.

Therefore.

Height of BCD = 36 - h.

Since the triangles are similar and their corresponding sides have the same ratio, we have the expression:

$\frac{b}{h} = \frac{b}{h}$

Substituting figures, we have:

$\frac{20}{h} = \frac{10}{36-h}$

Cross multiplying, we have:

20(36-h) = 10 * h

720 - 20h = 10h

720 = 10h + 20h

720 = 30h

$h = \frac{720}{30}$

h = 24 cm

Therefore, the height of triangle ABE is 24cm

7 0

3 years ago