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2 years ago

14

2. What is the variable in the expression: 13x3 +7 (Select one answer) 7 3 13

1 answer:

sdas [7]2 years ago

3 0

I think it would be 3

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Jenica has $4.50 in dimes and quarters. She has 1 more than three as many quarters as dimes. How many quarters does she have?

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Laura has $4.50 in dimes and quarters she has 3 more dimes than quarters How many quarters does she have

She has 3 more dimes than quarters. How many quarters does she have? Laura has 15 dimes and 12 quarters.

Step-by-step explanation:

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3 years ago

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#19 solve the equation. 5m + 4m = 72

Ganezh [65]

5m + 4m = 72

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3 years ago

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You are trying to hack into your mom's computer. You know your password is 4 letters and then a number but you can not remember

podryga [215]

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3 years ago

Can someone tell me what I did wrong here

Soloha48 [4]

Answer:

no roots.

Step-by-step explanation:

1) $\sqrt{8x+16}=2-8; \ - \ correct;$

2) $\sqrt{8x+16}=-6; \ - \ correct;$

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8 0

2 years ago

A trader bought x mangoes at the rate of 4 mangoes for 10 naira five of the mangoes were bad so he sold the remaining at the rat

Ilya [14]

Answer:

20 mangoes.

Step-by-step explanation:

Given:

Total number of mangoes, a trader bought = $x$

A trader bought at the rate of 4 mangoes for 10 naira.

Five of the mangoes were bad.

He sold the remaining at the rate of 5 mangoes for 20 naira.

He made a gain of 10 naira

Question asked:

Total number of mangoes, a trader bought = $x$ = ?

Solution:

Unitary method

Cost price of 4 mangoes = 10 naira.

Cost price of 1 mango = $\frac{10}{4}$

Cost price of $x$ mango = $\frac{10}{4}\times x= \frac{5}{2} x$

As 5 of the mangoes were bad and he sold the remaining mangoes, then Total number of mangoes sold = $x-5$

Sale price of 5 mangoes = 20 naira

Sale price of 1 mango = $\frac{20}{5}$

Sale price $x-5$ of mango = $\frac{20}{5}\times(x-5)=4(x-5)=4x-20$

Now, as we know,

$Gain = Sale price - cost price$

$10 = 4x-20 -\frac{5}{2} x\\ 10=4x-\frac{5}{2} x-20\\10=\frac{8x-5x}{2} -20$

$10 =\frac{3x}{2} -20$

Adding both sides by 20

$30=\frac{3x}{2}$

Multiplying both sides by 2

$60 = 3x$

Dividing both sides by 3

$x=20$

Therefore, total number of mangoes, a trader bought is 20.

3 0

3 years ago