URGENT!! Really need help on this test

Mathematics

1 answer:

Anuta_ua [19.1K]2 years ago

7 0

Answer:

x=17

Step-by-step explanation:

53+(2x+3)=90

You might be interested in

Given y= 2x squared - 10x find all the real values of x for which y = -3

Thepotemich [5.8K]

$y=2 x^{2} -10x \\ -3=2 x^{2} -10x \\ 2 x^{2} -10x+3=0 \\ x=\frac{-b \pm \sqrt{ b^{2} -4ac} }{2a}, \ where \ a=2, \ b=-10, \ c=3$
Therefore,
$x=\frac{-(-10) \pm \sqrt{ (-10)^{2} -(4 \times 2 \times 3)} }{2 
\times 2} \\ =\frac{10 \pm \sqrt{ 100 -24} }{4} \\ =\frac{10 \pm \sqrt{ 
76} }{4} \\= \frac{10 + \sqrt{ 76} }{4} \ or \ \frac{10 - \sqrt{ 76} 
}{4} \\ =4.679 \ or \ 0.3206$

8 0

2 years ago

A car drove 10/45 miles in 0.4 hours. How fast was the car traveling in miles per hour?

BARSIC [14]

Answer:

1.2 hours equal to 30mph

Step-by-step explanation:

Pls mark brainliest

7 0

3 years ago

Ques

ruslelena [56]

The answer is B. False

6 0

2 years ago

Transform the equation x-3y=-15 to express it in slope-intercept form

Juli2301 [7.4K]

X-3y=-15
-3y=-x-15
-1(-3y=-x-15)
3y=x+15
3/3y=1/3x+15/3
y=1/3x+5

4 0

2 years ago

12. What is the length of SQ? F.5 H.13 G.9 J.17

netineya [11]

Answer:

Step-by-step explanation:

4 0

3 years ago