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3 years ago

Do a + a + a + a and 4a a have the same value for any value of ? Explain how you know

Mathematics

1 answer:

stepladder [879]3 years ago

4 0

Answer:

Step-by-step explanation:

4a=a*a*a*a

4a is 4 times the variable <em>a</em>, not the variable <em>a</em> added to itself 4 times.

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A map has a scale of 1: 500 000.

Shkiper50 [21]

Answer:

350km

Step-by-step explanation:

If a map has a scale of 1: 500000, then 1 cm on the map is 500000 cm

So 7 cm on the map is 35000000 cm = 350 km

8 0

2 years ago

Read 2 more answers

Melanie invested $3,800 in an account paying an interest rate of 2 % compounded

GaryK [48]

Answer:

.85

Step-by-step explanation:

Compound interest formula

$PV(1+\frac{i}{n})^{nt}$

Melanie:

$3800(1+\frac{.02}{4})^{(6*4)\\}\\=3800(1+.005)^{24}\\3800*1.1272=4283.21$

Sebastian:

$3800(1+\frac{.02}{12})^{12*6}\\3800(1.0017)^{72}\\3800*1.1274=4284.06$

4824.06-4283.21= .85

4 0

2 years ago

As a nurse, part of your daily duties is to mix medications in the proper proportions for your patients. For one of your regular

spayn [35]

Answer:

10 milligrams of Medication A

Step-by-step explanation:

We'll write proportions/ratios for this:

20:16 is the usual proportion, and x:8 is this week's dose. The ratio from A to B has to be equal, so

20/16 = x/8

Cross-multiply:

(20)(8) = (16)(x)

160 = 16x

divide both sides by 16

x = 10

Please let me know if you have questions about this answer.

5 0

3 years ago

A rectangle is 3 feet longer than it is wide . if the perimeter is 30 feet , find the area in square feet .

noname [10]

Answer:

Hey

Step-by-step explanation:

I beleve you answer is 10 because 3 time 10 equals 30 and the question sais "3 times longer"

5 0

3 years ago

Pleqse help me do this thank you

SpyIntel [72]

Answer:

84 grams; 5 ounces

Step-by-step explanation:

1oz = 28g

3*1oz = 3*28g

3 oz = 84g

140g = 5*28g = 5*1oz

140g = 5oz

5 0

3 years ago