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3 years ago

8

Erica's cell phone bill for July was $82. She sent a check for $50 and then made $37 worth of calls in August. How much did she

owe on her cell phone bill?

1 answer:

KIM [24]3 years ago

7 0

The Answer is -69 because if you lay out the problem it is -82+50-37=-69

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What number must be placed in the box in the equation below to produce an equation that has more than one solution: 5u+3(4u-6)=-

Sergeeva-Olga [200]

Answer: the number must be placed in the box is 9

suppose: the number must be placed in the box is x

have:

5u + 3(4u - 6) = -3u -27 + 20u + x

⇔ 5u + 12u - 18 = -3u - 27 + 20u +x

⇔ 17u + 3u - 20u = -27 + 18 + x

⇔ 0 = x - 9

⇔ x = 9

Step-by-step explanation:

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3 years ago

Alec pours the same amount of soup into 3 bowls. He uses 4 cups of soup. How much soup goes into each bowl

Vesna [10]

4/3 cups of soup goes in each

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3 years ago

Find the value of x in the solution to the system of equations shown. y = 4x - 3 y= -x - 13

Kamila [148]

Answer:

B (-2 , -11)

Step-by-step explanation:

hello : the system is :

y = 4x - 3

y= -x - 13

put x = -2

y = 4(-2) - 3=- 11

y= -(-2) - 13 = -11

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3 years ago

If a coin is flipped 75 times, in how many ways could there be exactly two tails?

Dimas [21]

Answer:

2775 ways

Step-by-step explanation:

We have been given the case to choose exactly two tails when flipped 75 times means $^{75}C_2$

Since, $^nC_r$ is equal to $\frac{n!}{r!\cdot(n-r)!}$

Here n =75, r=2 substituting the values we will get

$\frac{75!}{2!(75-2)!}$

$n!=n\cdot (n-1)\cdot (n-2).....1$

After simplification we will get $\frac{75\cdot 74\cdot 73!}{2!\cdot73!}$

Cancel out the common term that is 73! we will get

after more simplification we will get $\frac{75\cdot 74\cdot}{2!}$

Finally, we will get $\frac{75\cdot 74\cdot}{2}=75\cdot37=2775$

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