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laiz [17]
3 years ago
14

3x^2+7x=30______________

Mathematics
2 answers:
goblinko [34]3 years ago
8 0

Answer:

if you need help with problems like that I suggest algebra calculator or math away

Step2247 [10]3 years ago
3 0

(Hint)

by using quadratic formula we can find the value of x

3x^2+7x-30

a=3

b=7

c=-30

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Help please this is so hard I don't understand it​
Zina [86]

Answer:

<ABC = 15

< BAC = 150

Step-by-step explanation:

<C = <B since this is an isosceles triangle.  We know this because AC = AB

<C = 15 so <ABC = 15

The sum of the angles of a triangle is 180

A + B+ C = 180

A + 15+15 = 180

A +30 =180

A = 180-30

A = 150

< BAC = 150

5 0
3 years ago
In order to play in chess tournaments at the Marshall Club, Malik pays a fee to become a member. In addition, he pays a set rate
Keith_Richards [23]

Answer:

p = 22.50 + 15t

Step-by-step explanation:

For Malik :

Membership fee = m

Rate per tournament = t

After 4 tournaments :

m + 4t = 85 - - - (1)

After 7 tournaments :

m + 7t = 130 - - - (2)

Subtract 2 from 1

4t - 7t = 85 - 130

-3t = - 45

t = 45 / 3

t = 15

Put, t = 15 in (1)

m + 4(15) = 85

m + 60 = 85

m = 85 - 60

m = 25

Massai pays 10% less membership fee than Malik

Hence, Massai's membership fee:

(100 - 10)% * 25

0.9 * 25 = $22.50

Total price, p, Massai will pay to compete in t tournaments ;

Total price = membership fee + (rate per tournament * number of tournaments)

p = 22.50 + 15t

3 0
2 years ago
A number of students prepared for an examination. Arts, Religion and sculpture. Out of this number, 15 took arts, 20 took religi
True [87]
I got 8 students.
Hope this helps :)
5 0
2 years ago
WILL MARK BRAINLIEST IF RIGHT NEED IT ASAP<br> Evaluate the expression for j = 5. <br>2j^2 =
lisov135 [29]

Answer:

50

Step-by-step explanation:

your expression: 2j²

plug in j = 5: 2(5)²

solve for the exponent: 2(25)

multiply: 50

4 0
3 years ago
Read 2 more answers
A person invests 10000 dollars in a bank. The bank pays 7%
Darya [45]

Answer:

t=9.40865\approx 9.4 \text{ years}

t=9.40865≈9.4 years

Step-by-step explanation:

7 0
3 years ago
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