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elena-s [515]
3 years ago
5

Eva's coin purse contained 10 more dimes than nickels. The total value of the nickels and dimes was $10. How many coins of each

type were there?
Mathematics
1 answer:
salantis [7]3 years ago
7 0

Answer:

60 nickels

70 dimes

Step-by-step explanation:

convert $10 to cents

$10 = 1000 pennies

1000 = 5x + 10 (x+10)

1000 = 15x + 100

900 = 15x

x = 60

60 nickels

70 dimes

check to be sure this adds up to $10

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Write the quadratic equation in standard form:<br> 2x – 1=-x^2
klasskru [66]

Answer: -x^2-2x-1

Step-by-step explanation:

3 0
3 years ago
Nell's mom makes chocolate milk with 30\text{ mL}30 mL30, start text, space, m, L, end text of chocolate syrup for every 222 oun
mixas84 [53]

Answer:

Hence Nell's mom Chocolate milk is more Chocolaty.

Step-by-step explanation:

Given:

Chocolate syrup used by Nell's mom  = 30 ml

Amount of milk used = 2 ounces.

We will first find Amount of chocolate syrup used in 1 ounce of milk.

Now In 2 ounces of milk = 30 ml of chocolate syrup.

So in 1 ounce of milk = Amount of Chocolate syrup used for 1 ounce milk.

By using Unitary method we get;

Amount of Chocolate syrup used for 1 ounce milk= \frac{30}{2}=15\ ml

Hence For every 1  ounce of milk Nell's mom uses 15 ml of chocolate syrup.

Also Given:

Chocolate syrup used by Nell's dad  = 65 ml

Amount of milk used = 5 ounces.

We will first find Amount of chocolate syrup used in 1 ounce of milk.

Now In 5 ounces of milk = 65 ml of chocolate syrup.

So in 1 ounce of milk = Amount of Chocolate syrup used for 1 ounce milk.

By using Unitary method we get;

Amount of Chocolate syrup used for 1 ounce milk= \frac{65}{5}=13\ ml

Hence For every 1  ounce of milk Nell's dad uses 13 ml of chocolate syrup.

Since The amount of chocolate syrup used by Nell's mom is more than Nell's dad.

Hence Nell's mom Chocolate milk is more Chocolaty.

6 0
3 years ago
Women athletes at the university of colorado, boulder, have a long-term graduation rate of 67% (source: the chronicle of higher
Elodia [21]

 

The solution would be like this for this specific problem:

H0: p = p0, or <span>
H0: p ≥ p0, or 
H0: p ≤ p0 </span>

 

find the test statistic z = (pHat - p0) / sqrt(p0 * (1-p0) / n) 

 

where pHat = X / n 

 

The p-value of the test is the area under the normal curve that is in agreement with the alternate hypothesis. <span>
H1: p ≠ p0; p-value is the area in the tails greater than |z| 
H1: p < p0; p-value is the area to the left of z 
H1: p > p0; p-value is the area to the right of z </span>

 

Hypothesis equation:

 

H0: p ≥ 0.67 vs. H1: p < 0.67 

 

The test statistic is: <span>
z = ( 0.5526316 - 0.67 ) / ( √ ( 0.67 * (1 - 0.67 ) / 38 ) 
z = -1.538681 </span>

 

The p-value = P( Z < z ) <span>
= P( Z < -1.538681 ) 
<span>= 0.0619</span></span>

6 0
3 years ago
A shirt that normally costs $35.00 is on sale for 28.00. What is the percent discount?
Olin [163]

Answer:

$25.20

Step-by-step explanation:

$35 x 0.28

= $9.80

35-9.80

= $25.20

3 0
3 years ago
Read 2 more answers
Graph. Y + 1 = 1/3 ( x - 3)
zvonat [6]

Answer:

y=1/3x-2

Step-by-step explanation:

Plot a point at x=-2 and then for the slope (1/3, rise/run) count up 1 and over 3 starting from -2. This is a line. Y intercept at -2 and x intercept at 6.

6 0
3 years ago
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